>Why doesn't the property sheet list all of the available properties in the MAPI control? I found a currentuser property. Are there any more?

Click on properties:

http://msdn.microsoft.com/library/devprods/vs6/vbasic/mapi98/vbobjmapis.htm
http://msdn.microsoft.com/library/devprods/vs6/vbasic/mapi98/vbobjmapim.htm