Catch wndproc in flutter app #21

class App extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return WndProc(
      wndproc: (int hwnd, int msg, int wParam, int lParam) {
        switch (msg) {
          case WM_MOUSEMOVE:
            break;

          case WM_CLOSE:
            break;

          case WM_SIZE:
            break;

          case WM_FONTCHANGE:
            break;

          case WM_DPICHANGED:
            break;
        }
      }
    );
  }
}