The SCOM API has a built-in capability to provide SCOM usage statistics. The statistics can be retrieved at any time using SCOM_GetStatistics function. The returned value is a copy of a SCOMStatistics structure, that has an up-to-date information about SCOM usage including information such as:

number of frames that were sent since the SCOM connection was opened or statistics were reset (in case of multi-frames, each sub-frame is counted)
number of frames that were received since the SCOM connection was opened or statistics were reset (in case of multi-frames, each sub-frame is counted)
number of retransmissions needed when sending frames
number of retransmissions detected when receiving frames

At any point the statistics can be reset to 0 by calling SCOM_ResetStatistics function.