Ok, i think you will need to do some further research, but this can be both checked and set using VB and WMI. The link below has a script which can perform this from the command line; http://forums.whirlpool.net.au/forum-replies-archive.cfm/919407.html[^] What you will need to do is look for other examples (there are some on CP) on making WMI calls from VB, and then translate the script version calls to suit. Happy problem solving! Dave Don't forget to rate messages! Find Me On: Web|Facebook|Twitter|LinkedIn Waving? dave.m.auld[at]googlewave.com

I want verify if they're in the same lan not if a pc is accessible over lan!

You can upgrade VB to VB.NET as VB.NET is based on VB - but there are lots of points that you end up having to code yourself. Trust me on this - you can't automatically upgrade C++ to C#, and I don't go giving my email address to complete strangers. "WPF has many lovers. It's a veritable porn star!" - Josh Smith As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes. My blog | My articles | MoXAML PowerToys | Onyx