如何象一个窗口发送control+alt这2个按键的模拟消息

如何象一个窗口发送control+alt这2个按键的模拟消息

貌似一般的都没问题，但是系统键发不了

::PostMessage(m_hWnd,WM_KEYDOWN,VK_CONTROL,0);
::PostMessage(m_hWnd,WM_KEYDOWN,VK_MENU,0);
Sleep(10);
::PostMessage(m_hWnd,WM_KEYUP,VK_MENU,0);
::PostMessage(m_hWnd,WM_KEYUP,VK_CONTROL,0);

VK_MENU按键响应的不是WM_KEYDOWN事件，而是 WM_SYSKEYDOWN 和 WM_SYSKEYUP 事件
The WM_SYSKEYDOWN message is posted to the window with the keyboard focus when the user presses the F10 key (which activates the menu bar) or holds down the alt key and then presses another key.

::PostMessage(m_hWnd,WM_SYSKEYDOWN,VK_MENU,0);
::PostMessage(m_hWnd,WM_SYSKEYDOWN,VK_CONTROL,0);

Sleep(10);
::PostMessage(m_hWnd,WM_SYSKEYUP,VK_CONTROL,0);
::PostMessage(m_hWnd,WM_SYSKEYUP,VK_MENU,0);

貌似依然不行

C/C++ code

HWND hWnd = ::FindWindow(NULL, _T("A"));
    if(hWnd)
    {
        ::AttachThreadInput(::GetWindowThreadProcessId(::GetForegroundWindow(), NULL), GetCurrentThreadId(), TRUE);
        ::SetForegroundWindow(hWnd);
        keybd_event(VK_CONTROL, 0, 0, 0);
        keybd_event(VK_MENU, 0, 0, 0);
        keybd_event(VK_MENU, 0, KEYEVENTF_KEYUP, 0);
        keybd_event(VK_CONTROL, 0, KEYEVENTF_KEYUP, 0);
        ::AttachThreadInput(::GetWindowThreadProcessId(::GetForegroundWindow(), NULL), GetCurrentThreadId(), FALSE);
    }

HWND hWnd = ::FindWindow(NULL, _T("A"));
if(hWnd)
{
::SetForegroundWindow(hWnd);
keybd_event(VK_CONTROL, 0, 0, 0);
keybd_event(VK_MENU, 0, 0, 0);
keybd_event(VK_MENU, 0, KEYEVENTF_KEYUP, 0);
keybd_event(VK_CONTROL, 0, KEYEVENTF_KEYUP, 0);
}
直接这样就可以，