ive never used this COM component (i eventually found a pure asp one) so im not entirely sure, if you can get the full path you can get the filename out of it like this
this gets the file path, splits it at any \s (use /s if it isnt a physical path) and displays everything after the last \
strFilePath = "..."
arrFilePath = Split(strFilePath, "\")
strFileName = arrFilePath(UBound(arrFilePath))
you may be able to do a for each loop on the object to see all of the properties of that object and it will just tell you which to use, i would suggest looking where you got it from for a list of collections, methods, properties etc