MouseHook 检测鼠标何时移动

Question

我正在尝试创建一个简单的鼠标钩子来检测鼠标是否在移动，但是由于某些原因，当我运行程序时，鼠标根本不起作用，直到我停止该过程。

这是我的代码：

#include <windows.h>

HHOOK g_hMouse;

LRESULT CALLBACK MouseHook(int nCode, WPARAM wParam, LPARAM lParam)
{
    printf("MOUSE EVENT!\n");

    return CallNextHookEx(NULL, nCode, wParam, lParam);
}

int main()
{
    g_hMouse = SetWindowsHookEx(WH_MOUSE_LL, MouseHook, NULL, NULL);

    while (1) {
        Sleep(2);
    }

    return 0;
}

如有任何帮助，我们将不胜感激。

谢谢。

Answer 1

WM_MOUSE_LL 钩子要求安装它的线程不断发送消息；所以你需要一个 GetMessage/DispatchMessage 循环。有关详细信息，请参见 WM_MOUSE_LL:

的 MSDN 文档

This hook is called in the context of the thread that installed it. The call is made by sending a message to the thread that installed the hook. Therefore, the thread that installed the hook must have a message loop.

如果您只是想在 experimenting/debugging 时快速尝试一些事情，请将您的 Sleep() 替换为对 MessageBox(...) 的调用，这将阻止您的代码以便您进行测试，但它运行有自己的消息循环，所以钩子会运行.

MouseHook 检测鼠标何时移动

MouseHook to detect when mouse is moving

c++

winapi