Jun,
you might want to consider a program such as Camtasia by TechSmith, the people who make Snagit. We are using it now and it works great. Only $150. It allows you to make an AVI movie of anything you do on the screen and you can include add sound so it's just like you are there talking to the prospect showing them the demo. We put this on a CD with a simple VFP 6.0 program. The user selects a subject from a picklist and we run the media player from VFP. The user gets a demo movie with voice. I find this much better than shipping a demo program that the user dosen't know how to use.

John.

>Our company develops customized applications for almost two years now. we have recently considered deploying demo applications, the problem is we are afraid someone might copy our codes. Is there any way that we can encrypt our codes?
>
>Thank you and more power to the fox,
>
>Jun K.