if you want to view live video you need to add Hikvision Play SDK (Dssdk.dll & Playm4.dll) to the run time envionment, otherwise set play handle as NULL for API NET_DVR_RealPlay()

int CVideoGroup::Execute_OpenChannel()

(Old)hikClientInfo.hPlayWnd = hWnd[m_CamInfo.m_wNTSCPAL-1];

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