InfoPath Dev

Hello.  I am new to InfoPath.  I did try to find a post on my issue in the newbie section, but was unable.  I have an InfoPath form that I am publishing to SharePoint.  The user is required to check a boolean that "electronically signs" the document by populating another field with the user ID of the person logged into the machine.  I do not publish this piece of information.  I would like to be able to blank the boolean, and subsequently the electronic signature text box, each and every time the InfoPath form is opened from Sharepoint.  Any ideas on how to do this?

thanks! 

You have to write a piece of code to nullify values on form load events. You can get that form load events by going to tools->programming->loading events.

Hope it would be of some help to you.