>While trying to write a small utility program, I'm having problems trying to unzip a file in code. I've tried RUN and ShellExecute of shell32.dll to no avail. I'm trying to use WinZip command-line add-on.
>
>The codes I've tried:
>
>1. RUN "c:\program files\winzip\wzunzip MyZippedFile.zip"
>2. RUN '"c:\program files\winzip\wzunzip" MyZippedFile.zip'
>3. tcFileName = '"c:\program files\winzip\wzunzip" T0164.ZIP'
> ShellExecute(0,"open",tcFileName,"","",1)
>
>Any suggestions? TIA.

You might look at Rick Borup's utility WinZip Manager.
http://www.ita-software.com/foxpage.htm

It nicely wraps winzip functionality.