diff --git a/ChangeLog b/ChangeLog
index 12f492a15a7..bb73136c126 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -589,3 +589,5 @@
 	* Added some rasterizers to the graphics library
 
 0.3.20 2008-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>
+	* Initial release of a tiny windowing system for NuttX (not well tested at initial check-in)
+
diff --git a/Documentation/NuttX.html b/Documentation/NuttX.html
index c8aa054e0c4..0fdedd3db1a 100644
--- a/Documentation/NuttX.html
+++ b/Documentation/NuttX.html
@@ -8,7 +8,7 @@
   <tr align="center" bgcolor="#e4e4e4">
     <td>
       <h1><big><font color="#3c34ec"><i>NuttX RTOS</i></font></big></h1>
-      <p>Last Updated: November 26, 2008</p>
+      <p>Last Updated: November 28, 2008</p>
     </td>
   </tr>
 </table>
@@ -1205,6 +1205,7 @@ buildroot-0.1.2 2007-11-06 &lt;spudmonkey@racsa.co.cr&gt
 
 <pre><ul>
 nuttx-0.3.20 2008-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
+	* Initial release of a tiny windowing system for NuttX (not well tested at initial check-in)
 
 pascal-0.1.3 2008-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
 
diff --git a/examples/nx/nx_internal.h b/examples/nx/nx_internal.h
index 5209490b0ec..6ae52869bd7 100644
--- a/examples/nx/nx_internal.h
+++ b/examples/nx/nx_internal.h
@@ -58,7 +58,15 @@
 #endif
 
 #ifndef CONFIG_EXAMPLES_NX_BGCOLOR
-#  define CONFIG_EXAMPLES_NX_BGCOLOR 0
+#  define CONFIG_EXAMPLES_NX_BGCOLOR ' '
+#endif
+
+#ifndef CONFIG_EXAMPLES_NX_COLOR1
+#  define CONFIG_EXAMPLES_NX_COLOR1 '1'
+#endif
+
+#ifndef CONFIG_EXAMPLES_NX_COLOR2
+#  define CONFIG_EXAMPLES_NX_COLOR2 '2'
 #endif
 
 /* Debug ********************************************************************/
diff --git a/examples/nx/nx_main.c b/examples/nx/nx_main.c
index efbf747ca40..cd91cea2ecd 100644
--- a/examples/nx/nx_main.c
+++ b/examples/nx/nx_main.c
@@ -41,6 +41,7 @@
 
 #include <sys/types.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <unistd.h>
 #include <sched.h>
 #include <errno.h>
@@ -59,90 +60,188 @@
  * Private Types
  ****************************************************************************/
 
+enum exitcode_e
+{
+  NXEXIT_SUCCESS = 0,
+  NXEXIT_TASKCREATE,
+  NXEXIT_FBINITIALIZE,
+  NXEXIT_FBGETVPLANE,
+  NXEXIT_NXOPEN,
+  NXEXIT_NXSETBGCOLOR,
+  NXEXIT_NXOPENWINDOW,
+  NXEXIT_NXSETSIZE,
+  NXEXIT_NXSETPOSITION,
+  NXEXIT_NXCLOSEWINDOW
+};
+
 /****************************************************************************
  * Private Function Prototypes
  ****************************************************************************/
 
-static void my_redraw(NXWINDOW handle, FAR const struct nxgl_rect_s *rect,
-                      boolean more);
-static void my_position(NXWINDOW handle, FAR const struct nxgl_rect_s *size,
-                        FAR const struct nxgl_point_s *pos);
+static void nxeg_redraw1(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect,
+                         boolean more);
+static void nxeg_redraw2(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect,
+                         boolean more);
+static void nxeg_position1(NXWINDOW hwnd, FAR const struct nxgl_rect_s *size,
+                           FAR const struct nxgl_point_s *pos,
+                           FAR const struct nxgl_rect_s *bounds);
+static void nxeg_position2(NXWINDOW hwnd, FAR const struct nxgl_rect_s *size,
+                           FAR const struct nxgl_point_s *pos,
+                           FAR const struct nxgl_rect_s *bounds);
 #ifdef CONFIG_NX_MOUSE
-static void my_mousein(NXWINDOW handle, FAR const struct nxgl_point_s *pos,
-                       ubyte buttons);
+static void nxeg_mousein1(NXWINDOW hwnd, FAR const struct nxgl_point_s *pos,
+                          ubyte buttons);
+static void nxeg_mousein2(NXWINDOW hwnd, FAR const struct nxgl_point_s *pos,
+                          ubyte buttons);
 #endif
 #ifdef CONFIG_NX_KBD
-static void my_kbdin(NXWINDOW handle, ubyte nch, const ubyte *ch);
+static void nxeg_kbdin(NXWINDOW hwnd, ubyte nch, const ubyte *ch);
 #endif
 
 /****************************************************************************
  * Private Data
  ****************************************************************************/
 
-static const struct nx_callback_s g_nxcb =
+static const struct nx_callback_s g_nxcb1 =
 {
-  my_redraw,   /* redraw */
-  my_position  /* position */
+  nxeg_redraw1,   /* redraw */
+  nxeg_position1  /* position */
 #ifdef CONFIG_NX_MOUSE
-  , my_mousein /* mousein */
+  , nxeg_mousein1 /* mousein */
 #endif
 #ifdef CONFIG_NX_KBD
-  , my_kbdin   /* my kbdin */
+  , nxeg_kbdin1   /* my kbdin */
 #endif
 };
 
+static const struct nx_callback_s g_nxcb2 =
+{
+  nxeg_redraw2,   /* redraw */
+  nxeg_position2  /* position */
+#ifdef CONFIG_NX_MOUSE
+  , nxeg_mousein2 /* mousein */
+#endif
+#ifdef CONFIG_NX_KBD
+  , nxeg_kbdin2   /* my kbdin */
+#endif
+};
+
+static nxgl_coord_t g_xres;
+static nxgl_coord_t g_yres;
+
+static nxgl_mxpixel_t g_color1[CONFIG_NX_NPLANES];
+static nxgl_mxpixel_t g_color2[CONFIG_NX_NPLANES];
+
 /****************************************************************************
  * Private Functions
  ****************************************************************************/
 
 /****************************************************************************
- * Name: my_redraw
+ * Name: nxeg_redraw1
  ****************************************************************************/
 
-static void my_redraw(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect,
-                      boolean more)
+static void nxeg_redraw1(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect,
+                         boolean more)
 {
-  message("my_redraw: hwnd=%p rect={(%d,%d),(%d,%d)} more=%s\n",
+  message("nxeg_redraw1: hwnd=%p rect={(%d,%d),(%d,%d)} more=%s\n",
            hwnd,
            rect->pt1.x, rect->pt1.y, rect->pt2.x, rect->pt2.y,
            more ? "TRUE" : "FALSE");
+  nx_fill(hwnd, rect, g_color1);
 }
 
 /****************************************************************************
- * Name: my_position
+ * Name: nxeg_redraw2
  ****************************************************************************/
 
-static void my_position(NXWINDOW hwnd, FAR const struct nxgl_rect_s *size,
-                        FAR const struct nxgl_point_s *pos)
+static void nxeg_redraw2(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect,
+                         boolean more)
 {
-  message("my_position: hwnd=%p size={(%d,%d),(%d,%d)} pos=(%d,%d)\n",
+  message("nxeg_redraw2: hwnd=%p rect={(%d,%d),(%d,%d)} more=%s\n",
            hwnd,
-           size->pt1.x, size->pt1.y, size->pt2.x, size->pt2.y,
-           pos->x, pos->y);
+           rect->pt1.x, rect->pt1.y, rect->pt2.x, rect->pt2.y,
+           more ? "TRUE" : "FALSE");
+  nx_fill(hwnd, rect, g_color2);
 }
 
 /****************************************************************************
- * Name: my_mousein
+ * Name: nxeg_position1
+ ****************************************************************************/
+
+static void nxeg_position1(NXWINDOW hwnd, FAR const struct nxgl_rect_s *size,
+                           FAR const struct nxgl_point_s *pos,
+                           FAR const struct nxgl_rect_s *bounds)
+{
+  /* Report the position */
+
+  message("nxeg_position1: hwnd=%p size={(%d,%d),(%d,%d)} pos=(%d,%d) bounds={(%d,%d),(%d,%d)}\n",
+           hwnd,
+           size->pt1.x, size->pt1.y, size->pt2.x, size->pt2.y,
+           pos->x, pos->y,
+           bounds->pt1.x, bounds->pt1.y, bounds->pt2.x, bounds->pt2.y);
+
+  /* Save the window limits */
+
+  g_xres = bounds->pt2.x;
+  g_yres = bounds->pt2.y;
+}
+
+/****************************************************************************
+ * Name: nxeg_position2
+ ****************************************************************************/
+
+static void nxeg_position2(NXWINDOW hwnd, FAR const struct nxgl_rect_s *size,
+                           FAR const struct nxgl_point_s *pos,
+                           FAR const struct nxgl_rect_s *bounds)
+{
+  /* Report the position */
+
+  message("nxeg_position2: hwnd=%p size={(%d,%d),(%d,%d)} pos=(%d,%d) bounds={(%d,%d),(%d,%d)}\n",
+           hwnd,
+           size->pt1.x, size->pt1.y, size->pt2.x, size->pt2.y,
+           pos->x, pos->y,
+           bounds->pt1.x, bounds->pt1.y, bounds->pt2.x, bounds->pt2.y);
+
+  /* Save the window limits */
+
+  g_xres = bounds->pt2.x;
+  g_yres = bounds->pt2.y;
+}
+
+/****************************************************************************
+ * Name: nxeg_mousein1
  ****************************************************************************/
 
 #ifdef CONFIG_NX_MOUSE
-static void my_mousein(NXWINDOW hwnd, FAR const struct nxgl_point_s *pos,
-                       ubyte buttons)
+static void nxeg_mousein1(NXWINDOW hwnd, FAR const struct nxgl_point_s *pos,
+                          ubyte buttons)
 {
-  message("my_mousein: hwnd=%p pos=(%d,%d) button=%02x\n",
+  message("nxeg_mousein1: hwnd=%p pos=(%d,%d) button=%02x\n",
            hwnd,  pos->x, pos->y, buttons);
 }
 #endif
 
 /****************************************************************************
- * Name: 
+ * Name: nxeg_mousein2
+ ****************************************************************************/
+
+#ifdef CONFIG_NX_MOUSE
+static void nxeg_mousein2(NXWINDOW hwnd, FAR const struct nxgl_point_s *pos,
+                          ubyte buttons)
+{
+  message("nxeg_mousein2: hwnd=%p pos=(%d,%d) button=%02x\n",
+           hwnd,  pos->x, pos->y, buttons);
+}
+#endif
+
+/****************************************************************************
+ * Name: nxeg_kbdinfo
  ****************************************************************************/
 
 #ifdef CONFIG_NX_KBD
-static void my_kbdin(NXWINDOW hwnd, ubyte nch, const ubyte *ch)
+static void nxeg_kbdinfo(ubyte nch, const ubyte *ch)
 {
   int i;
-  message("my_kbdin: hwnd=%p nch=%d\n", hwnd, nch);
   for (i = 0; i < nch; i++)
     {
       if (isprint(ch[i]))
@@ -157,6 +256,30 @@ static void my_kbdin(NXWINDOW hwnd, ubyte nch, const ubyte *ch)
 }
 #endif
 
+/****************************************************************************
+ * Name: nxeg_kbdin1
+ ****************************************************************************/
+
+#ifdef CONFIG_NX_KBD
+static void nxeg_kbdin1(NXWINDOW hwnd, ubyte nch, const ubyte *ch)
+{
+  message("nxeg_kbdin1: hwnd=%p nch=%d\n", hwnd, nch);
+  nxeg_kbdinfo(nch, ch);
+}
+#endif
+
+/****************************************************************************
+ * Name: nxeg_kbdin2
+ ****************************************************************************/
+
+#ifdef CONFIG_NX_KBD
+static void nxeg_kbdin2(NXWINDOW hwnd, ubyte nch, const ubyte *ch)
+{
+  message("nxeg_kbdin2: hwnd=%p nch=%d\n", hwnd, nch);
+  nxeg_kbdinfo(nch, ch);
+}
+#endif
+
 /****************************************************************************
  * Public Functions
  ****************************************************************************/
@@ -176,25 +299,37 @@ void user_initialize(void)
 int user_start(int argc, char *argv[])
 {
   NXHANDLE hnx;
-  NXWINDOW hwnd;
+  NXWINDOW hwnd1;
+  NXWINDOW hwnd2;
 #ifndef CONFIG_NX_MULTIUSER
   FAR struct fb_vtable_s *fb;
 #else
   pid_t servrid;
 #endif
+  struct nxgl_rect_s rect;
+  struct nxgl_point_s pt;
   nxgl_mxpixel_t color;
-  int exitcode = 0;
+  int exitcode = NXEXIT_SUCCESS;
   int ret;
+  int i;
+
+  /* Initialize window colors */
+
+  for (i = 0; i < CONFIG_NX_NPLANES; i++)
+    {
+      g_color1[i] = CONFIG_EXAMPLES_NX_COLOR1;
+      g_color1[2] = CONFIG_EXAMPLES_NX_COLOR2;
+    }
 
 #ifdef CONFIG_NX_MULTIUSER
   /* Start the server task */
 
   message("user_start: Starting nx_servertask task\n");
-  servrid = task_create("NX Server", 50, CONFIG_EXAMPLES_NX_STACKSIZE, nx_servertask, argv);
+  servrid = task_create("NX Server", 50, CONFIG_EXAMPLES_NX_STACKSIZE, nx_servertask, NULL);
   if (servrid < 0)
     {
       message("user_start: Failed to create nx_servertask task: %d\n", errno);
-      exitcode = 1;
+      exitcode = NXEXIT_TASKCREATE;
       goto errout;
     }
 
@@ -204,7 +339,7 @@ int user_start(int argc, char *argv[])
 
   /* Connect to the server */
 
-  hnx = nx_connect(&g_nxcb);
+  hnx = nx_connect();
 #else
   /* Initialize the frame buffer device */
 
@@ -213,7 +348,7 @@ int user_start(int argc, char *argv[])
   if (ret < 0)
     {
       message("user_start: up_fbinitialize failed: %d\n", -ret);
-      exitcode = 2;
+      exitcode = NXEXIT_FBINITIALIZE;
       goto errout;
     }
 
@@ -221,21 +356,21 @@ int user_start(int argc, char *argv[])
   if (!fb)
     {
       message("user_start: up_fbgetvplane failed, vplane=%d\n", CONFIG_EXAMPLES_NX_VPLANE);
-      exitcode = 3;
+      exitcode = NXEXIT_FBGETVPLANE;
       goto errout;
     }
 
   /* Then open NX */
 
   message("user_start: Open NX\n");
-  hnx = nx_open(fb, &g_nxcb);
+  hnx = nx_open(fb);
 #endif
 
   message("user_start: NX handle=%p\n", hnx);
   if (!hnx)
     {
       message("user_start: Failed to get NX handle: %d\n", errno);
-      exitcode = 4;
+      exitcode = NXEXIT_NXOPEN;
       goto errout;
     }
 
@@ -247,32 +382,120 @@ int user_start(int argc, char *argv[])
   if (ret < 0)
     {
       message("user_start: nx_setbgcolor failed: %d\n", errno);
-      exitcode = 5;
+      exitcode = NXEXIT_NXSETBGCOLOR;
       goto errout_with_nx;
     }
 
-  /* Create a window */
+  /* Create window #1 */
 
-  message("user_start: Create a window\n");
-  hwnd = nx_openwindow(hnx);
-  message("user_start: NX window=%p\n", hwnd);
+  message("user_start: Create window #1\n");
+  hwnd1 = nx_openwindow(hnx, &g_nxcb1);
+  message("user_start: hwnd1=%p\n", hwnd1);
 
-  if (!hwnd)
+  if (!hwnd1)
     {
       message("user_start: nx_openwindow failed: %d\n", errno);
-      exitcode = 6;
+      exitcode = NXEXIT_NXOPENWINDOW;
       goto errout_with_nx;
     }
+  message("user_start: Screen resolution (%d,%d)\n", g_xres, g_yres);
 
-  /* Close the window */
+  /* Set the size of the window 2 */
 
-//errout_with_window:
+  rect.pt1.x = 0;
+  rect.pt1.y = 0;
+  rect.pt2.x = g_xres/2;
+  rect.pt2.y = g_yres/2;
+
+  message("user_start: Set hwnd1 size to (%d,%d)\n", rect.pt2.x, rect.pt2.y);
+  ret = nx_setsize(hwnd1, &rect);
+  if (ret < 0)
+    {
+      message("user_start: nx_setsize failed: %d\n", errno);
+      exitcode = NXEXIT_NXSETSIZE;
+      goto errout_with_hwnd1;
+    }
+
+  pt.x = g_xres / 4;
+  pt.y = g_yres / 4;
+
+  message("user_start: Set hwnd1 postion to (%d,%d)\n", pt.x, pt.y);
+  ret = nx_setposition(hwnd1, &pt);
+  if (ret < 0)
+    {
+      message("user_start: nx_setposition failed: %d\n", errno);
+      exitcode = NXEXIT_NXSETPOSITION;
+      goto errout_with_hwnd1;
+    }
+
+  /* Create window #2 */
+
+  message("user_start: Create window #1\n");
+  hwnd2 = nx_openwindow(hnx, &g_nxcb2);
+  message("user_start: hwnd2=%p\n", hwnd2);
+
+  if (!hwnd2)
+    {
+      message("user_start: nx_openwindow failed: %d\n", errno);
+      exitcode = NXEXIT_NXOPENWINDOW;
+      goto errout_with_hwnd1;
+    }
+
+  /* Set the size of the window 2 == size of window 1*/
+
+  message("user_start: Set hwnd2 size to (%d,%d)\n", rect.pt2.x, rect.pt2.y);
+  ret = nx_setsize(hwnd2, &rect);
+  if (ret < 0)
+    {
+      message("user_start: nx_setsize failed: %d\n", errno);
+      exitcode = NXEXIT_NXSETSIZE;
+      goto errout_with_hwnd2;
+    }
+
+  pt.x = g_xres - rect.pt2.x - pt.x;
+  pt.y = g_yres - rect.pt2.y - pt.y;
+
+  message("user_start: Set hwnd2 postion to (%d,%d)\n", pt.x, pt.y);
+  ret = nx_setposition(hwnd2, &pt);
+  if (ret < 0)
+    {
+      message("user_start: nx_setposition failed: %d\n", errno);
+      exitcode = NXEXIT_NXSETPOSITION;
+      goto errout_with_hwnd2;
+    }
+
+  /* Lower window 2 */
+
+  message("user_start: Lower window #2\n");
+  ret = nx_lower(hwnd2);
+  if (ret < 0)
+    {
+      message("user_start: nx_lower failed: %d\n", errno);
+      exitcode = NXEXIT_NXSETPOSITION;
+      goto errout_with_hwnd2;
+    }
+
+  /* Close the window 2 */
+
+errout_with_hwnd2:
   message("user_start: Close window\n");
-  ret = nx_closewindow(hwnd);
-  if (!hwnd)
+  ret = nx_closewindow(hwnd2);
+  if (ret < 0)
     {
       message("user_start: nx_openwindow failed: %d\n", errno);
-      exitcode = 7;
+      exitcode = NXEXIT_NXCLOSEWINDOW;
+      goto errout_with_nx;
+    }
+
+  /* Close the window1 */
+
+errout_with_hwnd1:
+  message("user_start: Close window\n");
+  ret = nx_closewindow(hwnd1);
+  if (ret < 0)
+    {
+      message("user_start: nx_openwindow failed: %d\n", errno);
+      exitcode = NXEXIT_NXCLOSEWINDOW;
       goto errout_with_nx;
     }
 
diff --git a/examples/nx/nx_server.c b/examples/nx/nx_server.c
index 3f48d190c4d..43d61c25b42 100644
--- a/examples/nx/nx_server.c
+++ b/examples/nx/nx_server.c
@@ -45,6 +45,7 @@
 #include <unistd.h>
 #include <sched.h>
 #include <errno.h>
+#include <debug.h>
 
 #include <nuttx/arch.h>
 #include <nuttx/nx.h>
@@ -91,7 +92,7 @@ int nx_servertask(int argc, char *argv[])
       return 1;
     }
 
-  fb = up_fbgetvplane(CONFIG_EXAMPLES_NX_VPLANE)
+  fb = up_fbgetvplane(CONFIG_EXAMPLES_NX_VPLANE);
   if (!fb)
     {
       message("nx_serverthread: up_fbgetvplane failed, vplane=%d\n", CONFIG_EXAMPLES_NX_VPLANE);
diff --git a/graphics/nxbe/nxbe.h b/graphics/nxbe/nxbe.h
index 077d8214e98..393a0607513 100644
--- a/graphics/nxbe/nxbe.h
+++ b/graphics/nxbe/nxbe.h
@@ -125,21 +125,22 @@ struct nxbe_window_s
 {
   /* State information */
 
-  FAR struct nxbe_state_s *be;      /* The back-end state structure */
+  FAR struct nxbe_state_s *be;        /* The back-end state structure */
 #ifdef CONFIG_NX_MULTIUSER
-  FAR struct nxfe_conn_s *conn;     /* Connection to the window client */
+  FAR struct nxfe_conn_s *conn;       /* Connection to the window client */
 #endif
+  FAR const struct nx_callback_s *cb; /* Event handling callbacks */
 
   /* The following links provide the window's vertical position using a
    * singly linked list.
    */
 
-  FAR struct nxbe_window_s *above;  /* The window "above" this window */
-  FAR struct nxbe_window_s *below;  /* The window "below this one */
+  FAR struct nxbe_window_s *above;    /* The window "above" this window */
+  FAR struct nxbe_window_s *below;    /* The window "below this one */
 
 
-  struct nxgl_rect_s bounds;        /* The bounding rectangle of window */
-  struct nxgl_point_s origin;       /* The position of the top-left corner of the window */
+  struct nxgl_rect_s bounds;          /* The bounding rectangle of window */
+  struct nxgl_point_s origin;         /* The position of the top-left corner of the window */
 };
 
 /* Back-end state ***********************************************************/
@@ -153,6 +154,13 @@ struct nxbe_state_s
   FAR struct nxbe_window_s *topwnd; /* The window at the top of the display */
   struct nxbe_window_s bkgd;        /* The background window is always at the bottom */
 
+  /* At present, only a solid colored background is supported for refills.  The
+   * following provides the background color.  It would be nice to support
+   * background bitmap images as well.
+   */
+
+  nxgl_mxpixel_t bgcolor[CONFIG_NX_NPLANES];
+
   /* vinfo describes the video controller and plane[n].pinfo describes color
    * plane 'n' supported by the video controller.  Most common color models
    * fit in one plane, but this array provides future support for hardware
diff --git a/graphics/nxglib/Make.defs b/graphics/nxglib/Make.defs
index 9502256cca4..b2e0acd1f25 100644
--- a/graphics/nxglib/Make.defs
+++ b/graphics/nxglib/Make.defs
@@ -56,8 +56,9 @@ RECT_CSRCS	= nxglib_rectcopy.c nxglib_rectoffset.c nxglib_vectoradd.c \
 		  nxglib_rectoverlap.c nxglib_nullrect.c
 TRAP_CSRCS	= nxglib_runoffset.c nxglib_runcopy.c \
 		  nxglib_trapoffset.c nxglib_trapcopy.c
+COLOR_CSRCS	= nxglib_colorcopy.c
 NXGLIB_CSRCS	= nxglib_rgb2yuv.c nxglib_yuv2rgb.c \
 		  $(RFILL1_CSRCS) $(RFILL2_CSRCS) $(TFILL1_CSRCS) $(TFILL2_CSRCS) \
 		  $(RMOVE1_CSRCS) $(RMOVE2_CSRCS) $(RCOPY1_CSRCS) $(RCOPY2_CSRCS) \
-		  $(RECT_CSRCS) $(TRAP_CSRCS)
+		  $(RECT_CSRCS) $(TRAP_CSRCS) $(COLOR_CSRCS)
 
diff --git a/graphics/nxsu/nxsu_mouse.c b/graphics/nxglib/nxglib_colorcopy.c
similarity index 57%
rename from graphics/nxsu/nxsu_mouse.c
rename to graphics/nxglib/nxglib_colorcopy.c
index 5650c8dd23f..a466640b383 100644
--- a/graphics/nxsu/nxsu_mouse.c
+++ b/graphics/nxglib/nxglib_colorcopy.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * graphics/nxmu/nxmu__mouse.c
+ * graphics/nxglib/nxsglib_colorcopy.c
  *
  *   Copyright (C) 2008 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
@@ -40,13 +40,8 @@
 #include <nuttx/config.h>
 
 #include <sys/types.h>
-#include <errno.h>
-#include <debug.h>
-
-#include <nuttx/nx.h>
-#include "nxfe.h"
-
-#ifdef CONFIG_NX_MOUSE
+#include <nuttx/fb.h>
+#include <nuttx/nxglib.h>
 
 /****************************************************************************
  * Pre-Processor Definitions
@@ -60,10 +55,6 @@
  * Private Data
  ****************************************************************************/
 
-static struct nxgl_point_s g_mpos;
-static struct nxgl_rect_s g_mrange;
-static struct g_mbutton;
-
 /****************************************************************************
  * Public Data
  ****************************************************************************/
@@ -77,102 +68,22 @@ static struct g_mbutton;
  ****************************************************************************/
 
 /****************************************************************************
- * Name: nxmu_mouseinit
+ * Name: nxgl_colorcopy
  *
  * Description:
- *   Initialize with the mouse in the center of the display
+ *   This is essentially memcpy for colors.  This does very little for us
+ *   other than hide all of the conditional compilation for planar colors
+ *   in one place.
  *
  ****************************************************************************/
 
-void nxmu_mouseinit(int x, int y)
+void nxgl_colorcopy(nxgl_mxpixel_t dest[CONFIG_NX_NPLANES],
+                    const nxgl_mxpixel_t src[CONFIG_NX_NPLANES])
 {
-  g_mrange.x = x;
-  g_mrange.y = y;
-  g_mpos.x   = x / 2;
-  g_mpos.y   = y / 2;
-  g_mbutton  = 0;
-}
+  int i;
 
-/****************************************************************************
- * Name: nxmu_mousereport
- *
- * Description:
- *   Report mouse position info to the specified window
- *
- ****************************************************************************/
-
-void nxmu_mousereport(struct nxbe_window_s *wnd)
-{
-  struct nxclimsg_mousein_s outmsg;
-  int ret;
-
-  outmsg.msgid   = NX_CLIMSG_MOUSEIN;
-  outmsg.wnd     = wnd;
-  outmsg.pos.x   = g_mpos.x;
-  outmsg.pos.y   = g_mpos.y;
-  outmsg.buttons = g_mbutton;
-
-  ret = mq_send(wnd->conn->swrmq, outmsg, sizeof(struct nxclimsg_mousein_s), NX_SVRMSG_PRIO);
-  if (ret < 0)
+  for (i = 0; i < CONFIG_NX_NPLANES; i++)
     {
-      gdbg("mq_send failed: %d\n", errno);
+      dest[i] = src[i];
     }
 }
-
-/****************************************************************************
- * Name: nxmu_mousein
- *
- * Description:
- *   New positional data has been received from the thread or interrupt
- *   handler that manages some kind of pointing hardware.  Route that
- *   positional data to the appropriate window client.
- *
- ****************************************************************************/
-
-void nxmu_mousein(FAR struct nxfe_state_s *fe,
-                  FAR const struct nxgl_point_s *pos, int button)
-{
-  struct nxbe_window_s *wnd;
-  x_coord_t x = pos->x;
-  x_coord_t y = pos->y;
-
-  /* Clip x and y to within the bounding rectangle */
-
-  if (x < 0)
-    {
-      x = 0;
-    }
-  else if (x >= g_mbound.x)
-    {
-      x = g_mbound.x - 1;
-    }
-
-  if (y < 0)
-    {
-      y = 0;
-    }
-  else if (y >= g_mbound.y)
-    {
-      y = g_mbound.y - 1;
-    }
-
-  /* Look any change in values */
-
-  if (x != g_mpos.x || y != g_mpos.y || button != g_mbutton)
-    {
-      /* Update the mouse value */
-
-      g_mpos.x  = x;
-      g_mpos.y  = y;
-      b_mbutton = button;
-
-      /* Pick the window to receive the mouse event */
-
-      for (wnd = fe->be.topwnd; wnd; wnd = wnd->below)
-        {
-          nxmu_mousereport(wnd);
-        }
-    }
-}
-
-#endif /* CONFIG_NX_MOUSE */
diff --git a/graphics/nxmu/Make.defs b/graphics/nxmu/Make.defs
index 0fb5e2c7055..29fc13d64e0 100644
--- a/graphics/nxmu/Make.defs
+++ b/graphics/nxmu/Make.defs
@@ -34,10 +34,11 @@
 ############################################################################
 
 NX_ASRCS	=
-NXAPI_CSRCS	= nx_bitmap.c nx_connect.c nx_disconnect.c nx_eventhandler.c \
-		  nx_fill.c nx_filltrapezoid.c nx_getposition.c nx_kbdchin.c \
-		  nx_kbdin.c nx_lower.c nx_mousein.c nx_move.c nx_openwindow.c \
-		  nx_raise.c nx_setsize.c nx_setbgcolor.c nx_setposition.c
+NXAPI_CSRCS	= nx_bitmap.c nx_closewindow.c nx_connect.c nx_disconnect.c \
+		  nx_eventhandler.c nx_fill.c nx_filltrapezoid.c \
+		  nx_getposition.c nx_kbdchin.c nx_kbdin.c nx_lower.c \
+		  nx_mousein.c nx_move.c nx_openwindow.c nx_raise.c \
+		  nx_setsize.c nx_setbgcolor.c nx_setposition.c
 NXMU_CSRCS	= nxmu_server.c nxmu_openwindow.c nxmu_reportposition.c nxmu_kbdin.c \
 		  nxmu_mouse.c  nxmu_redrawreq.c nxmu_semtake.c
 NX_CSRCS	= $(NXAPI_CSRCS) $(NXMU_CSRCS)
diff --git a/graphics/nxmu/nx_closewindow.c b/graphics/nxmu/nx_closewindow.c
index 0eab0170c2b..efda4643c4d 100644
--- a/graphics/nxmu/nx_closewindow.c
+++ b/graphics/nxmu/nx_closewindow.c
@@ -89,6 +89,7 @@
 int nx_closewindow(NXWINDOW hwnd)
 {
   FAR struct nxbe_window_s *wnd = (FAR struct nxbe_window_s *)hwnd;
+  FAR struct nxfe_conn_s *conn = wnd->conn;
   struct nxsvrmsg_closewindow_s outmsg;
   int ret;
 
diff --git a/graphics/nxmu/nx_connect.c b/graphics/nxmu/nx_connect.c
index 9e29f736be5..401d20d925a 100644
--- a/graphics/nxmu/nx_connect.c
+++ b/graphics/nxmu/nx_connect.c
@@ -99,7 +99,6 @@ static uint32 g_nxcid    = 1;
  *
  * Input Parameters:
  *   svrmqname - The name for the server incoming message queue
- *   cb     - Callbacks used to process received NX server messages
  *
  * Return:
  *   Success: A non-NULL handle used with subsequent NX accesses
@@ -107,8 +106,7 @@ static uint32 g_nxcid    = 1;
  *
  ****************************************************************************/
 
-NXHANDLE nx_connectionstance(FAR const char *svrmqname,
-                             FAR const struct nx_callback_s *cb)
+NXHANDLE nx_connectionstance(FAR const char *svrmqname)
 {
   FAR struct nxfe_conn_s *conn;
   struct nxsvrmsg_s       msg;
@@ -119,7 +117,7 @@ NXHANDLE nx_connectionstance(FAR const char *svrmqname,
   /* Sanity checking */
 
 #ifdef CONFIG_DEBUG
-  if (!svrmqname || !cb)
+  if (!svrmqname)
     {
       errno = EINVAL;
       return NULL;
@@ -135,10 +133,6 @@ NXHANDLE nx_connectionstance(FAR const char *svrmqname,
       goto errout;
     }
 
-  /* Save the callback vtable */
-
-  conn->cb = cb;
-
   /* Create the client MQ name */
 
   nxmu_semtake(&g_nxlibsem);
diff --git a/graphics/nxmu/nx_eventhandler.c b/graphics/nxmu/nx_eventhandler.c
index f89565b0103..cd1a1a7a1aa 100644
--- a/graphics/nxmu/nx_eventhandler.c
+++ b/graphics/nxmu/nx_eventhandler.c
@@ -128,6 +128,7 @@ int nx_eventhandler(NXHANDLE handle)
 {
   FAR struct nxfe_conn_s *conn = (FAR struct nxfe_conn_s *)handle;
   struct nxsvrmsg_s      *msg;
+  struct nxbe_window_s   *wnd;
   ubyte                   buffer[NX_MXCLIMSGLEN];
   int                     nbytes;
 
@@ -182,7 +183,9 @@ int nx_eventhandler(NXHANDLE handle)
       if (conn->cb->redraw)
         {
           FAR struct nxclimsg_redraw_s *redraw = (FAR struct nxclimsg_redraw_s *)buffer;
-          conn->cb->redraw((NXWINDOW)redraw->wnd, &redraw->rect, redraw->more);
+          wnd = redraw->wnd;
+          DEBUGASSERT(wnd);
+          wnd->cb->redraw((NXWINDOW)wnd, &redraw->rect, redraw->more);
         }
       break;
 
@@ -190,7 +193,9 @@ int nx_eventhandler(NXHANDLE handle)
       if (conn->cb->position)
         {
           FAR struct nxclimsg_newposition_s *postn = (FAR struct nxclimsg_newposition_s *)buffer;
-          conn->cb->position((NXWINDOW)postn->wnd, &postn->size, &postn->pos);
+          wnd = postn->wnd;
+          DEBUGASSERT(wnd);
+          wnd->cb->position((NXWINDOW)wnd, &postn->size, &postn->pos, &postn->bounds);
         }
       break;
 
@@ -199,7 +204,9 @@ int nx_eventhandler(NXHANDLE handle)
       if (conn->cb->mousein)
         {
           FAR struct nxclimsg_mousein_s *mouse = (FAR struct nxclimsg_mousein_s *)buffer;
-          conn->cb->mousein((NXWINDOW)mouse->wnd, &mouse->pos, mouse->buttons);
+          wnd = mouse->wnd;
+          DEBUGASSERT(wnd);
+          wnd->cb->mousein((NXWINDOW)wnd, &mouse->pos, mouse->buttons);
         }
       break;
 #endif
@@ -209,13 +216,15 @@ int nx_eventhandler(NXHANDLE handle)
       if (conn->cb->kbdin)
         {
           FAR struct nxclimsg_kbdin_s *kbd = (FAR struct nxclimsg_kbdin_s *)buffer;
-          conn->cb->kbdin((NXWINDOW)kbd->wnd, kbd->nch, kbd->ch);
+          wnd = kbd->wnd;
+          DEBUGASSERT(wnd);
+          wnd->cb->kbdin((NXWINDOW)wnd, kbd->nch, kbd->ch);
         }
       break;
 #endif
 
     default:
-      gdbg("Unrecogized message opcode: %d\n", (FAR struct nxsvrmsg_s *)buffer->msgid);
+      gdbg("Unrecognized message opcode: %d\n", ((FAR struct nxsvrmsg_s *)buffer)->msgid);
       break;
     }
 
diff --git a/graphics/nxmu/nx_fill.c b/graphics/nxmu/nx_fill.c
index 79a71ce8b71..b92aef537ad 100644
--- a/graphics/nxmu/nx_fill.c
+++ b/graphics/nxmu/nx_fill.c
@@ -44,6 +44,7 @@
 #include <errno.h>
 #include <debug.h>
 
+#include <nuttx/nxglib.h>
 #include <nuttx/nx.h>
 
 #include "nxfe.h"
@@ -88,13 +89,12 @@
  *
  ****************************************************************************/
 
-int nx_fill(NXWINDOW hwnd, FAR struct nxgl_rect_s *rect,
+int nx_fill(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect,
             nxgl_mxpixel_t color[CONFIG_NX_NPLANES])
 {
   FAR struct nxbe_window_s *wnd = (FAR struct nxbe_window_s *)hwnd;
   struct nxsvrmsg_fill_s  outmsg;
   int                     ret;
-  int                     i;
 
 #ifdef CONFIG_DEBUG
   if (!wnd || !wnd->conn || !rect || !color)
@@ -110,11 +110,7 @@ int nx_fill(NXWINDOW hwnd, FAR struct nxgl_rect_s *rect,
   outmsg.wnd   = wnd;
 
   nxgl_rectcopy(&outmsg.rect, rect);
-
-  for (i = 0; i < CONFIG_NX_NPLANES; i++)
-    {
-      outmsg.color[i] = color[i];
-    }
+  nxgl_colorcopy(outmsg.color, color);
 
   /* Forward the fill command to the server */
 
diff --git a/graphics/nxmu/nx_openwindow.c b/graphics/nxmu/nx_openwindow.c
index 927f5b8fd3c..03fa9786b46 100644
--- a/graphics/nxmu/nx_openwindow.c
+++ b/graphics/nxmu/nx_openwindow.c
@@ -79,7 +79,7 @@
  *
  * Input Parameters:
  *   handle - The handle returned by nx_connect
- *   wnd    - Location to return the handle of the new window
+ *   cb     - Callbacks used to process windo events
  *
  * Return:
  *   Success: A non-NULL handle used with subsequent NX accesses
@@ -87,13 +87,21 @@
  *
  ****************************************************************************/
 
-NXWINDOW nx_openwindow(NXHANDLE handle)
+NXWINDOW nx_openwindow(NXHANDLE handle, FAR const struct nx_callback_s *cb)
 {
   FAR struct nxfe_conn_s *conn = (FAR struct nxfe_conn_s *)handle;
   FAR struct nxbe_window_s *wnd;
   struct nxsvrmsg_openwindow_s outmsg;
   int ret;
 
+#ifdef CONFIG_DEBUG
+  if (!conn || !cb)
+    {
+      errno = EINVAL;
+      return NULL;
+    }
+#endif
+
   /* Pre-allocate the window structure */
 
   wnd = (FAR struct nxbe_window_s *)zalloc(sizeof(struct nxbe_window_s));
@@ -108,6 +116,7 @@ NXWINDOW nx_openwindow(NXHANDLE handle)
   outmsg.msgid = NX_SVRMSG_OPENWINDOW;
   outmsg.conn  = conn;
   outmsg.wnd   = wnd;
+  outmsg.cb    = cb;
 
   ret = mq_send(conn->cwrmq, &outmsg, sizeof(struct nxsvrmsg_openwindow_s), NX_SVRMSG_PRIO);
   if (ret < 0)
diff --git a/graphics/nxmu/nx_setbgcolor.c b/graphics/nxmu/nx_setbgcolor.c
index 57e3b944583..302c20549e5 100644
--- a/graphics/nxmu/nx_setbgcolor.c
+++ b/graphics/nxmu/nx_setbgcolor.c
@@ -91,7 +91,6 @@ int nx_setbgcolor(NXHANDLE handle,
   FAR struct nxfe_conn_s *conn = (FAR struct nxfe_conn_s *)handle;
   struct nxsvrmsg_setbgcolor_s outmsg;
   int ret;
-  int i;
 
 #ifdef CONFIG_DEBUG
   if (!conn)
@@ -103,12 +102,8 @@ int nx_setbgcolor(NXHANDLE handle,
 
   /* Format the fill command */
 
-  outmsg.msgid      = NX_SVRMSG_SETBGCOLOR;
-
-  for (i = 0; i < CONFIG_NX_NPLANES; i++)
-    {
-      outmsg.color[i] = color[i];
-    }
+  outmsg.msgid = NX_SVRMSG_SETBGCOLOR;
+  nxgl_colorcopy(outmsg.color, color);
 
   /* Forward the fill command to the server */
 
diff --git a/graphics/nxmu/nxfe.h b/graphics/nxmu/nxfe.h
index 8aa14af3c6f..65aa8cfec49 100644
--- a/graphics/nxmu/nxfe.h
+++ b/graphics/nxmu/nxfe.h
@@ -57,6 +57,10 @@
 
 /* Configuration ************************************************************/
 
+#ifdef CONFIG_DISABLE_MQUEUE
+#  error "Message queues are disabled(CONFIG_DISABLE_MQUEUE)"
+#endif
+
 #ifndef CONFIG_NX_MXSERVERMSGS
 #  define CONFIG_NX_MXSERVERMSGS 32 /* Number of pending messages in server MQ */
 #endif
@@ -203,6 +207,7 @@ struct nxclimsg_newposition_s
   FAR struct nxbe_window_s *wnd; /* The window whose position/size has changed */
   FAR struct nxgl_rect_s size;   /* The current window size */
   FAR struct nxgl_point_s pos;   /* The current window position */
+  FAR struct nxgl_rect_s bounds; /* Size of screen */
 };
 
 /* This message reports a new mouse event to a particular window */
@@ -249,6 +254,7 @@ struct nxsvrmsg_openwindow_s
   uint32 msgid;                      /* NX_SVRMSG_OPENWINDOW */
   FAR struct nxfe_conn_s *conn;      /* The specific connection sending the message */
   FAR struct nxbe_window_s *wnd;     /* The pre-allocated window structure */
+  FAR const struct nx_callback_s *cb; /* Event handling callbacks */
 };
 
 /* This message informs the server that client wishes to close a window */
@@ -429,7 +435,8 @@ EXTERN void nxmu_semtake(sem_t *sem);
 
 EXTERN void nxmu_openwindow(FAR struct nxfe_conn_s *conn,
                             FAR struct nxbe_state_s *be,
-                            FAR struct nxbe_window_s *wnd);
+                            FAR struct nxbe_window_s *wnd,
+                            FAR const struct nx_callback_s *cb);
 
 /****************************************************************************
  * Name: nxfe_reportposition
diff --git a/graphics/nxmu/nxmu_openwindow.c b/graphics/nxmu/nxmu_openwindow.c
index 508ab6ad8ff..15965179327 100644
--- a/graphics/nxmu/nxmu_openwindow.c
+++ b/graphics/nxmu/nxmu_openwindow.c
@@ -77,15 +77,17 @@
  *   conn - The client containing connection information [IN]
  *   be   - The server state structure [IN]
  *   wnd  - The pre-allocated window structure to be ininitilized [IN/OUT]
+ *   cb     - Callbacks used to process window events
  *
  * Return:
  *   None
  *
  ****************************************************************************/
 
-void nxsmu_openwindow(FAR struct nxfe_conn_s *conn,
-                      FAR struct nxbe_state_s *be,
-                      FAR struct nxbe_window_s *wnd)
+void nxmu_openwindow(FAR struct nxfe_conn_s *conn,
+                     FAR struct nxbe_state_s *be,
+                     FAR struct nxbe_window_s *wnd,
+                     FAR const struct nx_callback_s *cb)
 {
   /* The window structure was allocated in nx_openwindow and all fields have
    * been set to zero (except sem... see below).  We need only initialize the
@@ -94,6 +96,7 @@ void nxsmu_openwindow(FAR struct nxfe_conn_s *conn,
 
   wnd->be   = be;
   wnd->conn = conn;
+  wnd->cb   = cb;
 
   /* Now, insert the new window at the top on the display.  topwind is
    * never NULL (it may point only at the background window, however)
diff --git a/graphics/nxmu/nxmu_reportposition.c b/graphics/nxmu/nxmu_reportposition.c
index 64006a6d35b..ed72ca52fc4 100644
--- a/graphics/nxmu/nxmu_reportposition.c
+++ b/graphics/nxmu/nxmu_reportposition.c
@@ -43,6 +43,7 @@
 #include <errno.h>
 #include <debug.h>
 
+#include <nuttx/nxglib.h>
 #include <nuttx/nx.h>
 #include "nxfe.h"
 
@@ -90,10 +91,16 @@ void nxfe_reportposition(FAR struct nxbe_window_s *wnd)
   outmsg.pos.x = wnd->origin.x;
   outmsg.pos.y = wnd->origin.y;
 
-  /* Convert the frame rectangle to a window-relative rectangle */
+  /* Convert the window bounding box to a window-relative rectangle */
 
   nxgl_rectoffset(&outmsg.size, &wnd->bounds, -wnd->origin.x, -wnd->origin.y);
 
+  /* Provide the background window bounding box which is the screen limits
+   * It must always have (0,0) as its origin
+   */
+
+  nxgl_rectcopy(&outmsg.bounds, &wnd->be->bkgd.bounds);
+
   /* And provide this to the client */
 
   ret = mq_send(wnd->conn->swrmq, &outmsg, sizeof(struct nxclimsg_newposition_s), NX_SVRMSG_PRIO);
diff --git a/graphics/nxmu/nxmu_server.c b/graphics/nxmu/nxmu_server.c
index e1fc000e1e4..9d778a18576 100644
--- a/graphics/nxmu/nxmu_server.c
+++ b/graphics/nxmu/nxmu_server.c
@@ -378,7 +378,7 @@ int nx_runinstance(FAR const char *mqname, FAR struct fb_vtable_s *fb)
          case NX_SVRMSG_OPENWINDOW: /* Create a new window */
            {
              FAR struct nxsvrmsg_openwindow_s *openmsg = (FAR struct nxsvrmsg_openwindow_s *)buffer;
-             nxmu_openwindow(openmsg->conn, &fe.be, openmsg->wnd);
+             nxmu_openwindow(openmsg->conn, &fe.be, openmsg->wnd, openmsg->cb);
            }
            break;
 
@@ -454,6 +454,7 @@ int nx_runinstance(FAR const char *mqname, FAR struct fb_vtable_s *fb)
          case NX_SVRMSG_SETBGCOLOR: /* Set the color of the background */
            {
              FAR struct nxsvrmsg_setbgcolor_s *bgcolormsg = (FAR struct nxsvrmsg_setbgcolor_s *)buffer;
+             nxgl_colorcopy(fe.be.bgcolor, bgcolormsg->color);
              nxbe_fill(&fe.be.bkgd, &fe.be.bkgd.bounds, bgcolormsg->color);
            }
            break;
@@ -478,8 +479,15 @@ int nx_runinstance(FAR const char *mqname, FAR struct fb_vtable_s *fb)
          /* Messages sent to the backgound window ***************************/
 
          case NX_CLIMSG_REDRAW: /* Re-draw the background window */
-           nxbe_redraw(&fe.be, &fe.be.bkgd, &fe.be.bkgd.bounds);
-           break;
+            {
+              FAR struct nxclimsg_redraw_s *redraw = (FAR struct nxclimsg_redraw_s *)buffer;
+              DEBUGASSERT(redraw->wnd == &fe.be.bkgd);
+              gvdbg("Re-draw background rect={(%d,%d),(%d,%d)}\n",
+                    redraw->rect.pt1.x, redraw->rect.pt1.y,
+                    redraw->rect.pt2.x, redraw->rect.pt2.y);
+              nxbe_fill(&fe.be.bkgd, &redraw->rect, fe.be.bgcolor);
+            }
+          break;
 
          case NX_CLIMSG_MOUSEIN:      /* Ignored */
          case NX_CLIMSG_KBDIN:
diff --git a/graphics/nxsu/Make.defs b/graphics/nxsu/Make.defs
index 3750b6f7b09..b238251c389 100644
--- a/graphics/nxsu/Make.defs
+++ b/graphics/nxsu/Make.defs
@@ -38,5 +38,5 @@ NXAPI_CSRCS	= nx_bitmap.c nx_close.c nx_closewindow.c nx_fill.c \
 		  nx_filltrapezoid.c nx_getposition.c nx_kbdchin.c nx_kbdin.c \
 		  nx_lower.c nx_mousein.c nx_move.c nx_open.c nx_openwindow.c \
 		  nx_raise.c nx_setsize.c nx_setbgcolor.c nx_setposition.c
-NXSU_CSRCS	= nxsu_mouse.c  nxsu_redrawreq.c nxsu_reportposition.c
+NXSU_CSRCS	= nxsu_redrawreq.c nxsu_reportposition.c
 NX_CSRCS	= $(NXAPI_CSRCS) $(NXSU_CSRCS)
diff --git a/graphics/nxsu/nx_fill.c b/graphics/nxsu/nx_fill.c
index 14319f630db..b9102d1366f 100644
--- a/graphics/nxsu/nx_fill.c
+++ b/graphics/nxsu/nx_fill.c
@@ -88,7 +88,7 @@
  *
  ****************************************************************************/
 
-int nx_fill(NXWINDOW hwnd, FAR struct nxgl_rect_s *rect,
+int nx_fill(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect,
             nxgl_mxpixel_t color[CONFIG_NX_NPLANES])
 {
 #ifdef CONFIG_DEBUG
diff --git a/graphics/nxsu/nx_kbdchin.c b/graphics/nxsu/nx_kbdchin.c
index 8ce7a8ca2a2..37a357b42db 100644
--- a/graphics/nxsu/nx_kbdchin.c
+++ b/graphics/nxsu/nx_kbdchin.c
@@ -87,11 +87,13 @@ int nx_kbdchin(NXHANDLE handle, ubyte ch)
   FAR struct nxfe_state_s  *fe = (FAR struct nxfe_state_s *)handle;
   FAR struct nxbe_window_s *wnd = fe->be.topwnd;
 
-  /* Give the keypad event only to the top child */
+  /* Give the keypad event only to the top window (unless the top window
+   * is the background window).
+   */
 
-  if (fe->be.cb->kbdin)
+  if (wnd->cb->kbdin)
     {
-      fe->be.cb->kbdin(wnd, 1, &ch);
+      wnd->kbdin(wnd, 1, &ch);
     }
 }
 
diff --git a/graphics/nxsu/nx_kbdin.c b/graphics/nxsu/nx_kbdin.c
index cc9e53c0e22..c6f65eabb3d 100644
--- a/graphics/nxsu/nx_kbdin.c
+++ b/graphics/nxsu/nx_kbdin.c
@@ -86,11 +86,13 @@ int int nx_kbdin(NXHANDLE handle, ubyte nch const char *ch)
   FAR struct nxfe_state_s  *fe = (FAR struct nxfe_state_s *)handle;
   FAR struct nxbe_window_s *wnd = fe->be.topwnd;
 
-  /* Give the keypad event only to the top child */
+  /* Give the keypad event only to the top window (unless the top child
+   * is the background window).
+   */
 
-  if (fe->be.cb->kbdin)
+  if (wnd->cb->kbdin)
     {
-      fe->be.cb->kbdin(wnd, kbd->nch, kbd->ch);
+      wnd->cb->kbdin(wnd, kbd->nch, kbd->ch);
     }
 }
 
diff --git a/graphics/nxsu/nx_mousein.c b/graphics/nxsu/nx_mousein.c
index 30f53175e0a..256d59da18c 100644
--- a/graphics/nxsu/nx_mousein.c
+++ b/graphics/nxsu/nx_mousein.c
@@ -105,9 +105,9 @@ void nxsu_mousereport(struct nxbe_window_s *wnd)
 {
   /* Give the keypad event only to the top child */
 
-  if (fe->be.cb->mousein)
+  if (win->cb->mousein)
     {
-      fe->be.cb->mousein(wnd, &g_mpos, g_mbutton);
+      win->cb->mousein((NXWINDOW)wnd, &g_mpos, g_mbutton);
     }
 }
 
diff --git a/graphics/nxsu/nx_open.c b/graphics/nxsu/nx_open.c
index a28d385ae7f..2ebe94d4a42 100644
--- a/graphics/nxsu/nx_open.c
+++ b/graphics/nxsu/nx_open.c
@@ -56,10 +56,28 @@
  * Private Types
  ****************************************************************************/
 
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+static void nxsu_bkgdredraw(NXWINDOW hwnd,
+                            FAR const struct nxgl_rect_s *rect, boolean more);
+
 /****************************************************************************
  * Private Data
  ****************************************************************************/
 
+static const struct nx_callback_s g_bkgdcb =
+{
+  nxsu_bkgdredraw,   /* redraw */
+  NULL               /* position */
+#ifdef CONFIG_NX_MOUSE
+  , NULL             /* mousein */
+#endif
+#ifdef CONFIG_NX_KBD
+  , NULL             /* my kbdin */
+#endif
+};
 /****************************************************************************
  * Public Data
  ****************************************************************************/
@@ -68,6 +86,21 @@
  * Private Functions
  ****************************************************************************/
 
+/****************************************************************************
+ * Name: nxsu_bkgdredraw
+ ****************************************************************************/
+
+static void nxsu_bkgdredraw(NXWINDOW hwnd,
+                            FAR const struct nxgl_rect_s *rect, boolean more)
+{
+  FAR struct nxbe_window_s *wnd = (FAR struct nxbe_window_s *)hwnd;
+  FAR struct nxbe_state_s  *be  = wnd->be;
+
+  gvdbg("BG redraw rect={(%d,%d),(%d,%d)}\n",
+        rect->pt1.x, rect->pt1.y, rect->pt2.x, rect->pt2.y);
+  nxbe_fill(wnd, &wnd->bounds, be->bgcolor);
+}
+
 /****************************************************************************
  * Name: nxsu_setup
  ****************************************************************************/
@@ -97,9 +130,11 @@ static inline int nxsu_setup(FAR struct fb_vtable_s *fb,
     }
 #endif
 
-  /* Initialize the non-NULL elements of the background window */
+  /* Initialize the non-NULL elements of the back-end structure window */
+  /* Initialize the background window */
 
   fe->be.bkgd.be = &fe->be;
+  fe->be.bkgd.cb = &g_bkgdcb;
 
   fe->be.bkgd.bounds.pt2.x = fe->be.vinfo.xres;
   fe->be.bkgd.bounds.pt2.y = fe->be.vinfo.yres;
@@ -133,7 +168,6 @@ static inline int nxsu_setup(FAR struct fb_vtable_s *fb,
  *
  * Input Parameters:
  *   fb - Vtable "object" of the framebuffer "driver" to use
- *   cb - Callbacks used to process received NX server messages
  *
  * Return:
  *   Success: A non-NULL handle used with subsequent NX accesses
@@ -141,7 +175,7 @@ static inline int nxsu_setup(FAR struct fb_vtable_s *fb,
  *
  ****************************************************************************/
 
-NXHANDLE nx_open(FAR struct fb_vtable_s *fb, FAR const struct nx_callback_s *cb)
+NXHANDLE nx_open(FAR struct fb_vtable_s *fb)
 {
   FAR struct nxfe_state_s *fe;
   int ret;
@@ -149,7 +183,7 @@ NXHANDLE nx_open(FAR struct fb_vtable_s *fb, FAR const struct nx_callback_s *cb)
   /* Sanity checking */
 
 #ifdef CONFIG_DEBUG
-  if (!cb)
+  if (!fb)
     {
       errno = EINVAL;
       return NULL;
@@ -165,10 +199,6 @@ NXHANDLE nx_open(FAR struct fb_vtable_s *fb, FAR const struct nx_callback_s *cb)
       return NULL;
     }
 
-  /* Save the callback vtable */
-
-  fe->cb = cb;
-
   /* Initialize and configure the server */
 
   ret = nxsu_setup(fb, fe);
@@ -177,6 +207,9 @@ NXHANDLE nx_open(FAR struct fb_vtable_s *fb, FAR const struct nx_callback_s *cb)
       return NULL; /* nxsu_setup sets errno */
     }
 
+  /* Fill the initial background window */
+
+  nxbe_fill(&fe->be.bkgd, &fe->be.bkgd.bounds, fe->be.bgcolor);
   return (NXHANDLE)fe;
 }
 
diff --git a/graphics/nxsu/nx_openwindow.c b/graphics/nxsu/nx_openwindow.c
index ef205c2baa9..005d907fd76 100644
--- a/graphics/nxsu/nx_openwindow.c
+++ b/graphics/nxsu/nx_openwindow.c
@@ -79,7 +79,7 @@
  *
  * Input Parameters:
  *   handle - The handle returned by nx_connect
- *   wnd    - Location to return the handle of the new window
+ *   cb     - Callbacks used to process windo events
  *
  * Return:
  *   Success: A non-NULL handle used with subsequent NX accesses
@@ -87,14 +87,14 @@
  *
  ****************************************************************************/
 
-NXWINDOW nx_openwindow(NXHANDLE handle)
+NXWINDOW nx_openwindow(NXHANDLE handle, FAR const struct nx_callback_s *cb)
 {
   FAR struct nxfe_state_s *fe = (FAR struct nxfe_state_s *)handle;
   FAR struct nxbe_state_s *be = &fe->be;
   FAR struct nxbe_window_s *wnd;
 
 #ifdef CONFIG_DEBUG
-  if (!fe)
+  if (!fe || !cb)
     {
       errno = EINVAL;
       return NULL;
@@ -113,6 +113,7 @@ NXWINDOW nx_openwindow(NXHANDLE handle)
   /* Initialize the window structure */
 
   wnd->be           = be;
+  wnd->cb           = cb;
 
   /* Insert the new window at the top on the display.  topwind is
    * never NULL (it may point only at the background window, however)
@@ -124,6 +125,10 @@ NXWINDOW nx_openwindow(NXHANDLE handle)
   be->topwnd->above = wnd;
   be->topwnd        = wnd;
 
+  /* Report the initialize size/position of the window */
+
+  nxfe_reportposition((NXWINDOW)wnd);
+
   /* Provide the initial mouse settings */
 
 #ifdef CONFIG_NX_MOUSE
diff --git a/graphics/nxsu/nx_setbgcolor.c b/graphics/nxsu/nx_setbgcolor.c
index ce0be2f473d..4bc02be10d0 100644
--- a/graphics/nxsu/nx_setbgcolor.c
+++ b/graphics/nxsu/nx_setbgcolor.c
@@ -98,6 +98,7 @@ int nx_setbgcolor(NXHANDLE handle,
     }
 #endif
 
+  nxgl_colorcopy(fe->be.bgcolor, color);
   nxbe_fill(&fe->be.bkgd, &fe->be.bkgd.bounds, color);
   return OK;
 }
diff --git a/graphics/nxsu/nxfe.h b/graphics/nxsu/nxfe.h
index 5ea01b1290f..f4e4cdfd003 100644
--- a/graphics/nxsu/nxfe.h
+++ b/graphics/nxsu/nxfe.h
@@ -61,7 +61,10 @@
 
 /* Server state structure ***************************************************/
 
-/* This the the server 'front-end' state structure */
+/* This the the server 'front-end' state structure.  It is really the same
+ * as the back-end state, but we wrap the back-end state so that we can add
+ * things to the structure in the future
+ */
 
 struct nxfe_state_s
 {
@@ -71,10 +74,6 @@ struct nxfe_state_s
    */
 
   struct nxbe_state_s be;
-
-  /* Event handling callbacks */
-
-  FAR const struct nx_callback_s *cb; /* Message handling callbacks */
 };
 
 /****************************************************************************
diff --git a/graphics/nxsu/nxsu_redrawreq.c b/graphics/nxsu/nxsu_redrawreq.c
index 796b329c752..b7623f42643 100644
--- a/graphics/nxsu/nxsu_redrawreq.c
+++ b/graphics/nxsu/nxsu_redrawreq.c
@@ -80,18 +80,16 @@
 
 void nxfe_redrawreq(FAR struct nxbe_window_s *wnd, FAR const struct nxgl_rect_s *rect)
 {
-  FAR struct nxbe_state_s  *be  = wnd->be;
-  FAR struct nxfe_state_s  *fe  = (FAR struct nxfe_state_s *)be;
-  struct nxgl_rect_s        relrect;
+  struct nxgl_rect_s relrect;
 
 #ifdef CONFIG_DEBUG
-  if (wnd)
+  if (!wnd)
     {
       return;
     }
 #endif
 
-  if (fe->cb->redraw)
+  if (wnd->cb->redraw)
     {
       /* Convert the frame rectangle to a window-relative rectangle */
 
@@ -99,7 +97,7 @@ void nxfe_redrawreq(FAR struct nxbe_window_s *wnd, FAR const struct nxgl_rect_s
 
       /* And request the redraw */
 
-      fe->cb->redraw((NXWINDOW)wnd, &relrect, FALSE);
+      wnd->cb->redraw((NXWINDOW)wnd, &relrect, FALSE);
     }
 }
 
diff --git a/graphics/nxsu/nxsu_reportposition.c b/graphics/nxsu/nxsu_reportposition.c
index 97dddee4ae1..7c7bad75156 100644
--- a/graphics/nxsu/nxsu_reportposition.c
+++ b/graphics/nxsu/nxsu_reportposition.c
@@ -80,8 +80,7 @@
 
 void nxfe_reportposition(FAR struct nxbe_window_s *wnd)
 {
-  FAR struct nxbe_state_s  *be  = wnd->be;
-  FAR struct nxfe_state_s  *fe  = (FAR struct nxfe_state_s *)be;
+  FAR struct nxbe_state_s  *be = wnd->be;
   struct nxgl_rect_s        rect;
 
 #ifdef CONFIG_DEBUG
@@ -95,14 +94,14 @@ void nxfe_reportposition(FAR struct nxbe_window_s *wnd)
    * with the way things are done in multiple user mode.
    */
 
-  if (fe->cb->position)
+  if (wnd->cb->position)
     {
       /* Convert the frame rectangle to a window-relative rectangle */
 
       nxgl_rectoffset(&rect, &wnd->bounds, -wnd->origin.x, -wnd->origin.y);
 
-      /* And pride this to the client */
+      /* And provide this to the client */
 
-      fe->cb->position(wnd, &rect, &wnd->origin);
+      wnd->cb->position(wnd, &rect, &wnd->origin, &be->bkgd.bounds);
     }
 }
diff --git a/include/nuttx/nx.h b/include/nuttx/nx.h
index a8e77d22782..25ad7d1d0fa 100644
--- a/include/nuttx/nx.h
+++ b/include/nuttx/nx.h
@@ -53,6 +53,13 @@
 
 #define NX_DEFAULT_SERVER_MQNAME "/dev/nxs"
 
+/* Mouse button bits */
+
+#define NX_MOUSE_NOBUTTONS    0x00
+#define NX_MOUSE_LEFTBUTTON   0x01
+#define NX_MOUSE_CENTERBUTTON 0x02
+#define NX_MOUSE_RIGHTBUTTON  0x04
+
 /****************************************************************************
  * Public Types
  ****************************************************************************/
@@ -75,19 +82,93 @@ typedef FAR void *NXWINDOW;
 
 /* NX server callbacks ******************************************************/
 
-/* These define callbacks that must be provided to nx_connect.  These
+/* These define callbacks that must be provided to nx_openwindow.  These
  * callbacks will be invoked as part of the processing performed by
- * nx_message()
+ * nx_eventhandler()
  */
 
 struct nx_callback_s
 {
+  /**************************************************************************
+   * Name: redraw
+   *
+   * Descripton:
+   *   NX requests that the client re-draw the portion of the window within
+   *   with rectangle.
+   *
+   * Input Parameters:
+   *   hwnd - Window handle
+   *   rect - The rectangle that needs to be re-drawn (in window relative
+   *          coordinates
+   *   more - TRUE:  More re-draw requests will follow
+   *
+   * Returned Value:
+   *   None
+   *
+   **************************************************************************/
+
   void (*redraw)(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect, boolean more);
+
+  /**************************************************************************
+   * Name: position
+   *
+   * Descripton:
+   *   The size or position of the window has changed (or the window was
+   *   just created with zero size.
+   *
+   * Input Parameters:
+   *   hwnd   - Window handle
+   *   size   - The size of the window (pt1 should always be zero)
+   *   pos    - The position of the upper left hand corner of the window on
+   *            the overalll display
+   *   bounds - The bounding rectangle that the describes the entire
+   *            display
+   *
+   * Returned Value:
+   *   None
+   *
+   **************************************************************************/
+
   void (*position)(NXWINDOW hwnd, FAR const struct nxgl_rect_s *size,
-                   FAR const struct nxgl_point_s *pos);
+                   FAR const struct nxgl_point_s *pos,
+                   FAR const struct nxgl_rect_s *bounds);
+
+  /**************************************************************************
+   * Name: mousein
+   *
+   * Descripton:
+   *   New mouse data is available for the window
+   *
+   * Input Parameters:
+   *   hwnd    - Window handle
+   *   pos     - The (x,y) position of the mouse
+   *   buttons - See NX_MOUSE_* definitions
+   *
+   * Returned Value:
+   *   None
+   *
+   **************************************************************************/
+
 #ifdef CONFIG_NX_MOUSE
   void (*mousein)(NXWINDOW hwnd, FAR const struct nxgl_point_s *pos, ubyte buttons);
 #endif
+
+  /**************************************************************************
+   * Name: kbdin
+   *
+   * Descripton:
+   *   New keyboard/keypad data is available for the window
+   *
+   * Input Parameters:
+   *   hwnd - Window handle
+   *   nch  - The number of characters that are available in ch[]
+   *   ch   - The array of characters
+   *
+   * Returned Value:
+   *   None
+   *
+   **************************************************************************/
+
 #ifdef CONFIG_NX_KBD
   void (*kbdin)(NXWINDOW hwnd, ubyte nch, const ubyte *ch);
 #endif
@@ -135,7 +216,7 @@ extern "C" {
 
 #ifdef CONFIG_NX_MULTIUSER
 EXTERN int nx_runinstance(FAR const char *mqname, FAR struct fb_vtable_s *fb);
-#  define nx_run(fb) (NX_DEFAULT_SERVER_MQNAME, fb)
+#  define nx_run(fb) nx_runinstance(NX_DEFAULT_SERVER_MQNAME, fb)
 #endif
 
 /****************************************************************************
@@ -155,7 +236,6 @@ EXTERN int nx_runinstance(FAR const char *mqname, FAR struct fb_vtable_s *fb);
  *
  * Input Parameters:
  *   svrmqname - The name for the server incoming message queue
- *   cb        - Callbacks used to process received NX server messages
  *
  * Return:
  *   Success: A non-NULL handle used with subsequent NX accesses
@@ -164,9 +244,8 @@ EXTERN int nx_runinstance(FAR const char *mqname, FAR struct fb_vtable_s *fb);
  ****************************************************************************/
 
 #ifdef CONFIG_NX_MULTIUSER
-EXTERN NXHANDLE nx_connectionstance(FAR const char *svrmqname,
-                                    FAR const struct nx_callback_s *cb);
-#  define nx_connect(cb) nx_connectionstance(NX_DEFAULT_SERVER_MQNAME, cb)
+EXTERN NXHANDLE nx_connectionstance(FAR const char *svrmqname);
+#  define nx_connect(cb) nx_connectionstance(NX_DEFAULT_SERVER_MQNAME)
 #endif
 
 /****************************************************************************
@@ -190,8 +269,7 @@ EXTERN NXHANDLE nx_connectionstance(FAR const char *svrmqname,
  ****************************************************************************/
 
 #ifndef CONFIG_NX_MULTIUSER
-EXTERN NXHANDLE nx_open(FAR struct fb_vtable_s *fb,
-                        FAR const struct nx_callback_s *cb);
+EXTERN NXHANDLE nx_open(FAR struct fb_vtable_s *fb);
 #endif
 
 /****************************************************************************
@@ -271,7 +349,7 @@ EXTERN int nx_eventhandler(NXHANDLE handle);
  *
  * Input Parameters:
  *   handle - The handle returned by nx_connect
- *   wnd    - Location to return the handle of the new window
+ *   cb     - Callbacks used to process window events
  *
  * Return:
  *   Success: A non-NULL handle used with subsequent NX accesses
@@ -279,7 +357,8 @@ EXTERN int nx_eventhandler(NXHANDLE handle);
  *
  ****************************************************************************/
 
-EXTERN NXWINDOW nx_openwindow(NXHANDLE handle);
+EXTERN NXWINDOW nx_openwindow(NXHANDLE handle,
+                              FAR const struct nx_callback_s *cb);
 
 /****************************************************************************
  * Name: nx_closewindow
@@ -332,6 +411,23 @@ EXTERN int nx_getposition(NXWINDOW hwnd);
 
 EXTERN int nx_setposition(NXWINDOW hwnd, FAR struct nxgl_point_s *pos);
 
+/****************************************************************************
+ * Name: nx_setsize
+ *
+ * Description:
+ *  Set the size of the selected window
+ *
+ * Input Parameters:
+ *   hwnd   - The window handle
+ *   size   - The new size of the window.
+ *
+ * Return:
+ *   OK on success; ERROR on failure with errno set appropriately
+ *
+ ****************************************************************************/
+
+EXTERN int nx_setsize(NXWINDOW hwnd, FAR struct nxgl_rect_s *size);
+
 /****************************************************************************
  * Name: nx_raise
  *
@@ -380,7 +476,7 @@ EXTERN int nx_lower(NXWINDOW hwnd);
  *
  ****************************************************************************/
 
-EXTERN int nx_fill(NXWINDOW hwnd, FAR struct nxgl_rect_s *rect,
+EXTERN int nx_fill(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect,
                    nxgl_mxpixel_t color[CONFIG_NX_NPLANES]);
 
 /****************************************************************************
diff --git a/include/nuttx/nxglib.h b/include/nuttx/nxglib.h
index 47471a5f8b3..18284a2d4c0 100644
--- a/include/nuttx/nxglib.h
+++ b/include/nuttx/nxglib.h
@@ -446,6 +446,18 @@ EXTERN void nxgl_trapoffset(FAR struct nxgl_trapezoid_s *dest,
 EXTERN void nxgl_trapcopy(FAR struct nxgl_trapezoid_s *dest,
                           FAR const struct nxgl_trapezoid_s *src);
 
+/****************************************************************************
+ * Name: nxgl_colorcopy
+ *
+ * Description:
+ *   This is essentially memcpy for colors.  This does very little for us
+ *   other than hide all of the conditional compilation for planar colors
+ *   in one place.
+ *
+ ****************************************************************************/
+
+EXTERN void nxgl_colorcopy(nxgl_mxpixel_t dest[CONFIG_NX_NPLANES],
+                           const nxgl_mxpixel_t src[CONFIG_NX_NPLANES]);
 #undef EXTERN
 #if defined(__cplusplus)
 }