||To get the square meters, try the following:
MsgBox "Element Area in Map Units: " & Round(pArea.Area, 4) & " m" & Chr(178)
This assumes that what ever font you are using has the superscript two at ascii code 178.
ASCII 179 is superscript three.
As for reading the dll, the simple answer is that you can't read the underlying code as it is compiled.
It you want code examples, the three traditional places to point a new user are: the developers code included on the CD, arcgisdeveloperonline.esri.com and also that some of samples on the arcscripts site also include code.