vc外部程序问题

我在程序中打开了qq影音后怎么获得他播放暂停停止等动作呢  打开代码如下    SHELLEXECUTEINFO sei = { 0 };
    sei.cbSize = sizeof(SHELLEXECUTEINFO);
    sei.fMask = SEE_MASK_NOCLOSEPROCESS;
    sei.hwnd = NULL;
    sei.lpVerb = "Open";
    sei.lpFile = "C:\\qqplayer\\QQplayer.exe";
    sei.lpParameters = "C:\\test.avi";
    sei.lpDirectory = NULL;
    sei.nShow = SW_SHOW;
    sei.hInstApp = NULL;    ShellExecuteEx(&sei);