钩挂钩程序后无限呼叫 [英] After hooking hook procedure is called infinitely
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问题描述
我已经通过调用API连接了WM_SETFOCUS消息
I have hooked WM_SETFOCUS message by calling API
hhookCallWndProc = SetWindowsHookEx(WH_CALLWNDPROC, HookCallWndProc, hInst, threadID);
挂钩程序
extern "C" LRESULT _declspec(dllexport) __stdcall CALLBACK HookCallWndProc(int nCode, WPARAM wParam, LPARAM lParam)
{
if (nCode == HC_ACTION) {
CWPSTRUCT* info = (CWPSTRUCT*) lParam;
if(info->message == WM_SETFOCUS )
{
if(info->hwnd == hControl)
{
MessageBox(NULL,L"Focus on control",L"Focus",MB_OK);
}
}
}
return CallNextHookEx(hhookCallWndProc , nCode, wParam, lParam);
}
现在当我专注于控件时,这个钩子程序被调用。显示MessageBox。但是一旦我点击确定,就会弹出另一条消息。
Now when I focus on the control, this hook procedure is getting called . MessageBox is shown. But as soon as I click on Ok , another message pops up.
消息会无限弹出。
当我专注于控件时,我只想获取一次messagebox,但这里我无限地收到消息。
Messages keep on popping up infinitely. I want to get messagebox only once whenever I focus on control, but here I am getting messages infinitely.
任何我做错了。
推荐答案
快速猜测 - 不关闭消息框强制重新控制控件,因此再次调用您的函数
Quick guess - doesn't closing a message box force a re-focus of the control and therefore call your function again?
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