>I need a low-overhead method to code a user inactivity timeout feature for an app I did for a client. The Windows screen-saver is not an option. I figure there is probably an API I can fiddle with to get a solution.

See thread #464527. Any Win32 functions are going to want a callback function, and VFP can't do that. Another alternative is to write and FLL that taps into VFP's events and handles it that way. Message #439018 has sample code.