Logging out of a network share drive without reboot?

Question

I have a small script that runs on each workstation which runs defrag and chkdsk and connect each workstation temporarily to a network share that they, normally, do not have access to. The command I use to connect to them is:

net use \\server\sharename [password] /USER:domain\username P:No

Is there a command to log that user out of the drive share without restarting the computer?

Workstations run on Windows XP SP3

EDIT: I've used:

net use \\server\sharename /delete

but the command returns "The network connection cannot be found". However, I can still navigate to \\server\sharename in MyComputer address line and have full access to it still.

EDIT2: Assume I've read through the help files for net use ;D

EDIT3: Would a reboot suffice? Yes... however it is more convenient to log the user out of the share instead =D. I know I'm difficult.

Answer 1

net use \\server\sharename /delete

EDIT: To cause the credentials to get flushed:

net use \\server\IPC$ /delete

Answer 2

net use \\server\sharename /delete

See the full net use command here.