diff --git a/src/dlangui/platforms/windows/winapp.d b/src/dlangui/platforms/windows/winapp.d
index f502a273..19498a9b 100644
--- a/src/dlangui/platforms/windows/winapp.d
+++ b/src/dlangui/platforms/windows/winapp.d
@@ -945,6 +945,7 @@ LRESULT WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
                     }
                 }
             }
+            return 0;
         case WM_MOUSELEAVE:
 		case WM_MOUSEMOVE:
 		case WM_LBUTTONDOWN: