Andrew

Try the documentation from this link,

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vblr7/html/vafc
tshell.asp

And watch for the Security Note.
Security Note   The Shell function requires unmanaged code permission, which
might affect its execution in partial trust situations. For more information,
see SecurityPermission Class and Code Access Permissions.

You may try using Process Class

-Harish
"ªL©ú©v" wrote: