private void PTZControl(int nCommand, bool bStop, int nSpeed) { DVR2Mjpeg clientForm = (DVR2Mjpeg)this.Owner; int nCurVideoform = clientForm.m_nCurIndex; if (nCurVideoform >= 0) { int nPlayHandel = clientForm.m_videoform[nCurVideoform].m_iPlayhandle; if (nPlayHandel > 0) { int nLoginID = clientForm.m_videoform[nCurVideoform].m_lLogin; int nChannel = clientForm.m_videoform[nCurVideoform].m_iChannel; XMSDK.H264_DVR_PTZControl(nLoginID, nChannel, (int)nCommand, bStop, nSpeed); } } }