Instead of WinZip you could use the AddZip DLLs. You can download them from the files section here. Go to the Win32API section and look for the Zip/Unzip utility.

>How to Winzip a file?
>
> RUN /N7 winzip.exe -min -a [filename] [zip.file]
>
>yes! This works, but the step was not completely done, i.e. no zip file is produced, the program starts to run the next line.
>
>How can I stop the program on the above line? (but still the user will not see the Winzip program)
>
>Thank you very much!