This way:

        MessageBox.Show("Machine name : " & Environment.MachineName)
        MessageBox.Show("User Domain Name : " & Environment.UserDomainName)
        MessageBox.Show("User Name : " & Environment.UserName)

>Hi
>
>How can I retrieve the currently logged-in Network user and Computer ID (SYS(0) in VFP)?
>
>Thanks
>Kev