>Steve, the most common approach is probably the global timer which checks >for some condition such as a message file in a messages folder. If it >exists your program displays the message and exits. The program should then >also check for the file on start up and not load if the file still exists. >This gives you control from the server when users can get back in again.

Since a timer would be running and checking for a file constantly, Would this method degarde performance at all? If so, what could I do to minimize any performance loss?