The CallWndRetProc hook procedure is an application-defined or library-defined callback function the system calls after the SendMessage function is called. After passing the message to the destination window procedure, the system passes the message to the hook procedure. The hook procedure can examine the message; it cannot modify it.
LRESULT CALLBACK CallWndRetProc(
int nCode, |
// hook code |
WPARAM wParam, |
// current-process flag |
LPARAM lParam |
// address of structure with message data |
); |
The return value should be zero.
An application installs the hook procedure by specifying the WH_CALLWNDPROCRET hook type and the address of the hook procedure in a call to the SetWindowsHookEx function.
CallWndRetProc is a placeholder for the application-defined or library-defined function name.
CallNextHookEx, CallWndProc, CWPRETSTRUCT, SendMessage, SetWindowsHookEx
file: /Techref/os/win/api/win32/func/src/f04_3.htm, 3KB, , updated: 2000/4/7 11:19, local time: 2024/12/8 20:28,
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