From 137402da1d0bc09ade80151b6d01e85b3d7bb264 Mon Sep 17 00:00:00 2001
From: Dan Walmsley <dan@walms.co.uk>
Date: Thu, 21 May 2020 09:33:17 -0300
Subject: [PATCH] add handler for DWM_COMPOSITION_CHANGED.

---
 src/Windows/Avalonia.Win32/WindowImpl.CustomCaptionProc.cs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Windows/Avalonia.Win32/WindowImpl.CustomCaptionProc.cs b/src/Windows/Avalonia.Win32/WindowImpl.CustomCaptionProc.cs
index 6716691872..a55a22c3c3 100644
--- a/src/Windows/Avalonia.Win32/WindowImpl.CustomCaptionProc.cs
+++ b/src/Windows/Avalonia.Win32/WindowImpl.CustomCaptionProc.cs
@@ -79,6 +79,10 @@ namespace Avalonia.Win32
 
             switch ((WindowsMessage)msg)
             {
+                case WindowsMessage.WM_DWMCOMPOSITIONCHANGED:
+                    // TODO handle composition changed.
+                    break;
+
                 case WindowsMessage.WM_NCHITTEST:
                     if (lRet == IntPtr.Zero)
                     {