How to reverse a check-out (force check-in)

Is there a way to reverse a checkout from an admin tool. We have two situations.

1. A developer checks out some code but forgets to check it in. They then leave for the weekend, but a situation arrises where another developer needs to fix an issue. We need to reverse the checkout of the first developer.

2. A developer upgrades to a new machine and names it something different than a machine that had some source checked out. The developer thought they had checked everything in, but there were some files not checked in. We need to override the checkout of that developer as his original machine is now gone.

Thanks in advance.

[659 byte] By [davidc1110] at [2008-2-22]