>I have a multi user system
>I become very slow. Is there any tips or tools I can use to speed up my app.

The best overall way I've found is to run the vfp Coverage Log and check the results for the slow spots. Put

SET COVERAGE TO c:\coverage.log (or whatever path+name) at the start of the app
SET COVERAGE TO at the end

Then examine the code at the largest times in the log...it can be a big help.