Not necessarily to call just any DLL... that would probably be difficult as well as raise the size of the executable significantly. I was thinking though that instead of the KIX32.EXE or WKIX32.EXE file intrinsically containing the code to perform sleep or wait states, Ruud could easily (and without increasing size too much, I would think) call the KERNEL32.DLL,SLEEP function that is built in already and available on all systems.