From e9d032d517d33e6ab36d3f19660ec923a2fccca3 Mon Sep 17 00:00:00 2001
From: Steve Cornett <21205494+stevecor@users.noreply.github.com>
Date: Mon, 14 Sep 2026 07:57:51 -0700
Subject: [PATCH] Fix wxStaticBox for dark mode with double buffering

Set custom painting mode for dark mode in MSWSetDarkOrLightMode()
because custom painting mode is not set in Create() when double
buffering.

Fixes #27004.

Closes #27007.
---
 include/wx/msw/statbox.h |  2 ++
 src/msw/statbox.cpp      | 13 +++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/include/wx/msw/statbox.h b/include/wx/msw/statbox.h
index 8026ed76a5..12aefaff22 100644
--- a/include/wx/msw/statbox.h
+++ b/include/wx/msw/statbox.h
@@ -78,6 +78,8 @@ public:
 protected:
     virtual wxWindowList GetCompositeWindowParts() const override;
 
+    virtual void MSWSetDarkOrLightMode(SetMode setmode) override;
+
     // return the region with all the windows inside this static box excluded
     WXHRGN MSWGetRegionWithoutChildren();
 
diff --git a/src/msw/statbox.cpp b/src/msw/statbox.cpp
index 76bc9c602a..68a12f3ddf 100644
--- a/src/msw/statbox.cpp
+++ b/src/msw/statbox.cpp
@@ -95,6 +95,19 @@ bool wxStaticBox::Create(wxWindow *parent,
     return true;
 }
 
+void wxStaticBox::MSWSetDarkOrLightMode(SetMode setmode)
+{
+    wxStaticBoxBase::MSWSetDarkOrLightMode(setmode);
+
+    // Set custom painting because the native control does not support dark mode.
+    //
+    // Note that it's not useful to check if we're using dark mode now because
+    // we must either be starting to use it now or had been using it at some
+    // point for this function to be called and once custom painting is
+    // enabled, calling this function doesn't do anything anyhow.
+    UseCustomPaint();
+}
+
 bool wxStaticBox::ShouldUseCustomPaint() const
 {
     // When not using double buffering, we paint the box ourselves by default