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fix: Update SystemThemeWatcher WndProc to listen to Windows theme changes #1677

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Merged
pomianowski merged 1 commit into from
Apr 17, 2026
+4 −0
Merged

fix: Update SystemThemeWatcher WndProc to listen to Windows theme changes #1677

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4 changes: 4 additions & 0 deletions src/Wpf.Ui/Appearance/SystemThemeWatcher.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@
// Copyright (C) Leszek Pomianowski and WPF UI Contributors.
// All Rights Reserved.

using System.Runtime.InteropServices;
using Windows.Win32;
using Wpf.Ui.Controls;
using Wpf.Ui.Interop;
Expand Down Expand Up @@ -155,6 +156,9 @@ private static IntPtr WndProc(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam
msg == (int)PInvoke.WM_DWMCOLORIZATIONCOLORCHANGED
|| msg == (int)PInvoke.WM_THEMECHANGED
|| msg == (int)PInvoke.WM_SYSCOLORCHANGE
|| (msg == (int)PInvoke.WM_SETTINGCHANGE &&
lParam != IntPtr.Zero &&
string.Equals(Marshal.PtrToStringUni(lParam), "ImmersiveColorSet", StringComparison.Ordinal))
)
{
UpdateObservedWindow(hWnd);
Expand Down
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