Function: LockWindowUpdate(HWNDhWndLock)

Description: Disables or reenables drawing in the specified window. Only one window can be locked at a time.

Parameters: hWndLock: Specifies the window in which drawing will be disabled. If this parameter is NULL, drawing in the locked window is enabled..

Returns: If the function succeeds, the return value is nonzero. If the function fails, the return value is zero.

Example: Select the icon to download the sample lockWinUpdate.a5p. This file demonstrates the difference between locking the window and not.