Runapp in Macro question

[Steve Albert]

I have a button on a form that, when clicked, will open a particular Word
document. I have no problem doing that when I write in the specified
directory. However, the database is deployed on 35 laptops, and the My
Douments folder on each is stored under the users username. So for me, it
would be "c:\documents and settings\steve\my documents\letter.doc". How can I
have a script find the current laptop user's username and insert it into the
path string?

Thanks.

- Steve