UpdateWindow function Null safety user32

int UpdateWindow(
  1. int hWnd
)

The UpdateWindow function updates the client area of the specified window by sending a WM_PAINT message to the window if the window's update region is not empty. The function sends a WM_PAINT message directly to the window procedure of the specified window, bypassing the application queue. If the update region is empty, no message is sent.

BOOL UpdateWindow(
  HWND hWnd
);

Implementation

int UpdateWindow(int hWnd) {
  final _UpdateWindow = _user32.lookupFunction<Int32 Function(IntPtr hWnd),
      int Function(int hWnd)>('UpdateWindow');
  return _UpdateWindow(hWnd);
}