tracking user applications using vbscript

I have one domain controller and some member servers and my clients/users logon on to these member servers remotely.

I want to apply a vbscript on them at logon time so that when they logon to any of my member server the following information is automatically stored in a file.

UserId computername Domain applications
abc 123 example.com msword
abc 123 example.com msexcel
xyz 456 example.com Inpage
ali 123 example.com Adobe PDF

I have done all the work except the application column.
i.e i want to know that which application is launched by the user.
i only need the vbscript for the application portion.