how to compile with server running?

How would I go about compiling the MUD when it is running in the background? It seems kind of tedious killing off the mud compling then booting it back in the area folder to see if the change was done right. Especially for people who are doing trial and error stuff.

I guess I forgot to note im using Cygwin.

This has been discussed many times before. You basically can't, because the exe is in use. In Windows, you can't delete a file while it's running.

But you can rename it while it's running. This leads to alot of crazy tricks you could do that have also been discussed at length.