InfoPath Dev

I am using visual studio tools for application in the load event of my infopath form to grap data from ldap. My question is once you publish the form to a sharepoint form library list does the server that houses the sharepoint site need to have VSTA on it.

Thanks,      I could not find any code samples for this. Do you know of any?

All i have several forms that have a contact area on them that i want to use the UserName() function to query ldap and grab that users info then populate the form. Any ideas or examples would be great thanks.