Hi, Riyaz.

>i have developed a software in vfp8.0 under windows environment.
>One of My client is having a mac network.
>Will the same software run in the mac environment
>is there any changes i have to do in my software for mac environment

As Sylvain said, VFP 8 runs on Windows only. Another chance you have is to use a Citrix Metaframe Server ( www.citrix.com ). It is a Windows 200/2003 Server with a software that let your Mac stations run a Windows session on the server, as if it was a local application.

It's not the cheaper alternative, but it will always be better than having to rewrite all the app in another platform/language.

As for Virtual PC, it is now a Microsoft product (they bought Connectix), and as Mark mentioned, they have a Mac edition. you can know more about it at:
http://www.microsoft.com/mac/products/virtualpc/virtualpc.aspx?pid=virtualpc

You have to weigth both possibilities and check what's the best price/features value for you.

Best luck,