在win32中挂钩

Question

我希望任何窗口在鼠标悬停在其非客户区的关闭按钮上时立即关闭。我尝试在 SetWindowsHookEx 中使用 WH_GETMESSAGE 捕获 wm_ncmousemove，然后 使用 SendMessage 向指定窗口发送 WM_DESTROY 消息，但窗口未关闭。有什么帮助？？？？

LRESULT CALLBACK CallWndProc(int code, WPARAM wParam, LPARAM lParam)

{

MSG* msg = (MSG*) lParam;
if(code == HC_ACTION)
{
    if(msg->message == WM_NCMOUSEMOVE)
    {
        if(msg->wParam == HTCLOSE)
        {
            SendMessage(hwndTarget, WM_DESTROY, wParam, lParam);
        }
    }
}

return CallNextHookEx(g_hkMsg, code, wParam, lParam);
}

INT WINAPI InstallW(HWND hwnd, HINSTANCE hInstance, LPWSTR lpCmdLine, int nCmdShow)
{

DWORD dwTarget = 0;
POINT point;

GetCursorPos(&point);

hwndTarget = WindowFromPoint(point);
dwTarget = GetWindowThreadProcessId(hwndTarget, NULL);
g_hkMsg = SetWindowsHookEx(WH_GETMESSAGE, CallWndProc, g_hInstance, 0);
if(g_hkMsg)
{
    MessageBox(NULL, L"Message hook installed, press OK to uninstall.", L"HLHookTest", MB_ICONEXCLAMATION);
    UnhookWindowsHookEx(g_hkMsg);
}
else
    MessageBox(NULL, L"Hook installation failed.", L"HLHookTest", MB_ICONERROR);

return 0;   
 }

Answer 1

使用wParam=SC_CLOSE 代替WM_CLOSE 或WM_SYSCOMMAND。

WM_CLOSE 和 WM_SYSCOMMAND / SC_CLOSE 要求关闭窗口。 WM_DESTROY 通知窗口它已关闭。对窗口说“您已关闭”不会使其关闭。