ActiveX and DOS commands

I am creating a SQL Server DTS Package, and inside of it I want to have an ActiveX task that provides command line functionality. What I need to do is zip up a few files and then encrypt that zip file. I already know the DOS commands to do this. What I need to know is how to code the VBscript within the ActiveX task to execute these commands. Any help is appreciated.

Please note that I could just execute a batch file within the DTS Package, but I am going to have some dynamic file naming going on and want the flexibility of using VBscript to code the command line.

Thanks!