Question

VC 向后台窗口发送按键消息

VC如何向指定的后台窗口发送按键消息？

如下的怎么不行？

void CSendMSG1Dlg::OnButton1()
{
// TODO: Add your control notification handler code here
HWND hClient = NULL;
TCHAR szCaption[128] = "C/C++/ VC++ － 群";//window title
hClient = ::FindWindowEx(NULL,hClient,NULL,szCaption);
::PostMessage(hClient, WM_SYSKEYDOWN,VK_MENU,0);
::PostMessage(hClient, WM_SYSKEYDOWN,VK_F4,0); //按下f4

::PostMessage(hClient, WM_SYSKEYUP,VK_MENU,0);
::PostMessage(hClient, WM_SYSKEYUP,VK_F4,0);
}

Answer 1

你有检查到hClient的值么（即FindWindowEx的返回值）
如果返回不成功的话你发的消息也无效了

另外：建议尝试使用SendMessage