Close alarm uploading channel.
BOOL NET_DVR_CloseAlarmChan_V30( LONG lAlarmHandle );
Value returned by NET_DVR_SetupAlarmChan_V50.
Return TURE for success, and return FALSE for failure.
If FALSE is returned, you can call NET_DVR_GetLastError to get the error code.
The available error codes of this API are 0, 3, 6, 12, 17, 41, and 47. See details in the Device Network SDK Errors.