This 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. UpdateWindow 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.
At a Glance
| Header file: | Winuser.h |
| Windows CE versions: | 1.0 and later |
Syntax
BOOL UpdateWindow( HWND hWnd);
Parameters
hWnd
Handle to the window to be updated.
Return Values
Nonzero indicates success. Zero indicates failure.
Windows NT: To get extended error information, call GetLastError.
See Also