Starting a 'floating' form once a spreadsheet is open

Hi,

I have created a form which gives the user an option of selecting the
source file for generating a spreadsheet. The form was created in
Excel's VBA interface.

Is there anyway I can get the form to automatically appear as soon as
the excel spreadsheet is open? At the moment, the user needs to go into
the VBA interface select the form and click 'run' before the form
appears on the spreadsheet. I would like the form to simply appear as
soon as the spreadhseet is open.

- K