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#define INCL_WINWINDOWMGR
 
BOOL WinLockWindowUpdate(hwndDesktop, hwndLockUpdate)
HWND hwndDesktop;       /* handle of the desktop               */
HWND hwndLockUpdate;    /* handle of the window to lock/unlock */
 
The WinLockWindowUpdate function prevents or allows the updating of a window
and its child windows. While updating is locked, no drawing will take place
on the screen. When updating is unlocked, portions of the screen are
invalidated and repainted.
 
Parameter       Description
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hwndDesktop     Identifies the desktop window. This parameter can be
                HWND_DESKTOP or the desktop window handle.
 
hwndLockUpdate  Identifies the window to be locked. If this parameter is
                NULL, all windows are unlocked.
 
Return Value
 
The return value is TRUE if the function is successful or FALSE if an error
occurs.
 
See Also
 
WinLockVisRegions
 
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