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1.首先在OCX的cpp文件中声明一个全局变量:
static HHOOK hHook=NULL;
2.定义hHook处理函数:
LRESULT CALLBACK GetMessageProc(int nCode, WPARAM wParam, LPARAM lParam)
{
AFX_MANAGE_STATE(AfxGetStaticModuleState( ));//模块切换时的状态保护指向当前模块状态
LPMSG lpMsg = (LPMSG) lParam;
if( (nCode >= 0) && (PM_REMOVE == wParam) &&
AfxGetApp()->PreTranslateMessage(lpMsg))
{
lpMsg->message = WM_NULL;
lpMsg->lParam = 0L;
lpMsg->wParam = 0;
}
// 将钩子消息传递给当前钩子链中的下一个钩子
return ::CallNextHookEx(hHook, nCode, wParam, lParam);
}
3.在OCX的"Oncreate"中添加如下代码:
hHook = ::SetWindowsHookEx(WH_GETMESSAGE, GetMessageProc,
AfxGetInstanceHandle(),GetCurrentThreadId());
4.释放资源,在OCX的"OnDestroy"消息中添加如下代码:
VERIFY(::UnhookWindowsHookEx(hHook));
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