See FIX: DOEVENTS Command Runs Slowly mskb #Q268771.

>>Thanks,Hilmar
>>
>>DoEvents,may be I can use it!!!
>
>I tried this, and it works (the user can click on a button while your program runs). However, it makes the program quite slow. I use VFP 6, and Vlad G. says the speed problem has been solved in VFP 7.
>
>A workaround for VFP 6 might be to issue DoEvents with less frequency. Something like this:
>
>

>select ... into cursor RecordsToProcess
>scan
>  if recno() % 100 = 0 && only once every 100 records
>    DoEvents
>  endif
>endscan
>

>
>Hilmar.