WIN API LockWindowUpdate-封鎖重繪視窗內容

The LockWindowUpdate function disables or reenables drawing in the specified window. Only one window can be locked at a time.

BOOL LockWindowUpdate(

    HWND hWndLock     // handle of window to lock 
   );   


Parameters

hWndLock

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



Return Values

If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero, indicating that an error occurred or another window was already locked.


截錄自 Windows SDK

Ex:
   LockWindowUpdate(Handle);  //封鎖某個視窗重繪
   LockWindowUpdate(0);  //解除