This is a little tricky. But the easiest way in this case is to check (in a loop) for the existance of the unziped file (Using the FILE() function).

Vlad

>But, I have a problem. I want to unzip a file under DOS and
>then use the file. I need the DOS command to finish process
>before it go to next command. How to check the DOS command's
>process is finished?
>
>Thank you.
>
>Charles