>Does it work under NT? For a few excited seconds it appeared to speed things up, >but I think it was just because I moved the mouse. I checked it under 95, 98, and NT4. If you're running the win16 processes (MPLAB and speed) in seperate addresses spaces, I can see where it would fail (I believe that was the default behavior with NT 3.5, but not with NT 4.) If that's the case, the windows title bar and 'Go' button in speed.exe won't change when you hit the button. You might try cranking up the number of events and decreasing the interval time (ms) to generate more messages. newell