用C++ Builder編HOOK程序

一,

HINSTANCE g_hinstDll = NULL;
HHOOK g_hhook　　　= NULL;
HWND　g_hwndPost　= NULL;
UINT　g_uMsgNotify = WM_USER;
HOOKPROC KeyboardHook_HookProc ( int nCode, WPARAM wParam, LPARAM lParam)
{
　 LRESULT lResult = CallNextHookEx(g_hhook, nCode, wParam, lParam);
　 if (nCode == HC_ACTION)
　 {
　　　 PostMessage(g_hwndPost, g_uMsgNotify, wParam, lParam);
　 }
　 return((HOOKPROC)lResult);
}
///////////
BOOL WINAPI SetKeyboardHook (HWND hWndPost, UINT Msg)
{
　 HHOOK hhook;
　 if (g_hhook != NULL) return(FALSE);
　 g_hwndPost　= hWndPost;
　 g_uMsgNotify = Msg;
　 Sleep(0);
　 if　(g_hLogHook==NULL)
　 hhook = SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardHook_HookProc,g_hinstDll, 0);
　 InterlockedExchange((PLONG) &g_hhook, (LONG) hhook);
　 return(g_hhook != NULL);
}
///
BOOL WINAPI ReleaseKeyboardHook()
{
　 BOOL fOK = TRUE;
　 if (g_hhook != NULL)
　 {
　　　 fOK = UnhookWindowsHookEx(g_hhook);
　　　 g_hhook = NULL;
　 }
　 return(fOK);
}
BOOL WINAPI DllMain (HINSTANCE hinstDll, DWORD fdwReason, LPVOID lpvReserved)
{
　 switch (fdwReason)
　 {
　　　 case DLL_PROCESS_ATTACH:
　　　　 g_hinstDll = hinstDll;
　　　　 break;
　 }
　 return(TRUE);
}