Some questions about WTSInfoExLevel

Question

I did not get much help from MSDN so posting question on the expert forum:

1. What is the difference between WTSInfoExLevel1.IncomingCompressedBytes and WTSInfoExLevel1.IncomingBytes

Is WTSInfoExLevel1.IncomingCompressedBytes the size of the data after (WTSInfoExLevel1.IncomingBytes) compression OR it is the size of data which was sent compressed.

2. Same question about the WTSInfoExLevel1.OutgoingCompressedBytes and WTSInfoExLevel1.OutgoingBytes