Manually capture pictures.
BOOL NET_DVR_ManualSnap( LONG lUserID, LPNET_DVR_MANUALSNAP lpInter, LPNET_DVR_PLATE_RESULT lpOuter );
[IN] User ID, which is returned by NET_DVR_Login_V40.
[IN] Manual capture parameters, see details in the structure NET_DVR_MANUALSNAP.
[OUT] Recognized result parameters, see details in the structure NET_DVR_PLATE_RESULT
Return TRUE for success, and return FALSE for failure.
If FALSE is returned, you can call NET_DVR_GetLastError to get the error code.