Checking for existence of computer

Can someone tell me how I can check for the existence of a computer on the network. I'm assuming that I need to use the API for this.

To help you understand my purpose in this, this is a description of my very simple application. Essentially I have a internal office messaging program. You simply select the user from a dropdown, type a message and hit "SEND" and the message is sent via the NET SEND command using the API. I want to check that the user is there before the message is sent.

Thanks,

Ryan

This will enumerate (list) all the computers in the domain

http://www.mvps.org/vbnet/code/netwo...serverenum.htm

I'm afraid that enumerate actually means 'count', not list...

I'm also after the code, but in an API format, as I need the facility to work in Microsoft Access.

So Pleasssssseeeee!!! does anyone know the API to simply return whether a computer is logged on to the network or not?

I tried the code in the link and it only returned the number of PC's on our network at the time.

Enumerate in computerese means to list the names of, not count.
It's a Computer Science term run amok.

The function will return all the NAMES of connected computers.
Search the list for the one you want. If you don't find it, it isn't there. Read the link.

Sorry, Jim - you're right! ;)

I see why it was doing what it was doing, now.

Doah!

Thanks!