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);