X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/b728a2126992acadec19e440cd2382fd22fde17e..12f72836af9b82348ef83713e5b5de3d0ce3b5d8:/src/msw/window.cpp

diff --git a/src/msw/window.cpp b/src/msw/window.cpp
index 6908a7b317..bd7a853adf 100644
--- a/src/msw/window.cpp
+++ b/src/msw/window.cpp
@@ -3950,6 +3950,19 @@ bool wxWindowMSW::HandlePower(WXWPARAM WXUNUSED_IN_WINCE(wParam),
 #endif
 }
 
+bool wxWindowMSW::IsDoubleBuffered() const
+{
+    for ( const wxWindow *wnd = this;
+          wnd && !wnd->IsTopLevel(); wnd =
+          wnd->GetParent() )
+    {
+        if ( ::GetWindowLong(GetHwndOf(wnd), GWL_EXSTYLE) & WS_EX_COMPOSITED )
+            return true;
+    }
+
+    return false;
+}
+
 // ---------------------------------------------------------------------------
 // owner drawn stuff
 // ---------------------------------------------------------------------------