Removes a hook procedure installed in a hook chain by the SetWindowsHookEx function.
BOOL UnhookWindowsHookEx( HHOOK hhk );
A handle to the hook to be removed. This parameter is a hook handle obtained by a previous call to SetWindowsHookEx.
Type: Type: BOOL
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
The hook procedure can be in the state of being called by another thread even after UnhookWindowsHookEx returns. If the hook procedure is not being called concurrently, the hook procedure is removed immediately before UnhookWindowsHookEx returns.
For an example, see Monitoring System Events.
|Minimum supported client||Windows 2000 Professional [desktop apps only]|
|Minimum supported server||Windows 2000 Server [desktop apps only]|
|Header||winuser.h (include Windows.h)|