在 MFC 程序中创建挂钩窗口

2022-01-12 00:00:00 hook winapi c++ mfc

我想在 MFC 程序中挂钩窗口创建.

I want to hook the window creation in an MFC program.

有什么办法吗?

推荐答案

使用SetWindowHookEx 来安装 CBTProc.

这里有一些示例代码.只需从程序开头调用 InstallHook()，然后监视 HCBT_CREATEWND 通知代码.您可以通过从函数返回非零值来取消窗口创建，如文档中所述.

Here's some sample code. Just call InstallHook() from the beginning of your program, and then monitor the HCBT_CREATEWND notification code. You can cancel window creation by returning nonzero from the function, as described in the docs.

LRESULT CALLBACK MyCbtHook(int nCode,  WPARAM wParam,  LPARAM lParam)
{
    switch(nCode)
    {
    case HCBT_CREATEWND:
        {
            HWND hWnd = (HWND)wParam;
            TRACE("A window is being created, HWND = %p
", hWnd);
            break;
        }
    }

    return CallNextHookEx( 0, nCode, wParam, lParam );
}

void InstallHook()
{
    SetWindowsHookEx(WH_CBT, MyCbtHook, 0, GetCurrentThreadId());
}

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