在MFC程式中建立视窗

Question

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

Is there any way to do that?

Answer 1

Use SetWindowHookEx to install a CBTProc .

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\n", hWnd);
            break;
        }
    }

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

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