diff --git a/Units/MMLAddon/windowselector.pas b/Units/MMLAddon/windowselector.pas
index 2f2fbce..8e32cb3 100644
--- a/Units/MMLAddon/windowselector.pas
+++ b/Units/MMLAddon/windowselector.pas
@@ -189,6 +189,7 @@ begin;
       end;
       TempHandle  := Handle;
     end;
+    Application.ProcessMessages;
     Sleep(64);
   end;
   Result := TempHandle;