How do I get the full username?

[VB6Coder]

Hi

In Microsoft Word if you go into the View\Options dialog and blank the text boxes in the User Information tab, the next time Word will start up, it'll display a dialog box prompting you to put in your name and initials. The Name text box is defaulted to my full name, not my network logon name.

e.g.
My Network username is MarkJon

but the name text box is defaulted to Mark Jones, which is my full name

I know how to use the GetUserName API to get the Network username (e.g. MarkJon), but how do I get the full name (e.g. Mark Jones).

Thanks in advance