>can u give a link fo sample


for example:

http://msdn.microsoft.com/msdnmag/issues/05/04/RegFreeCOM/default.aspx

or

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/xmlsdk/html/8ad27af9-15cc-4fec-b3db-6c9fc815d0b5.asp

You may find many others articles, if you go to http://msdn.microsoft.com and make a search by keywords: manifest dll com

Another useful keyword is SxS (which stands for Side-by-Side), - this is the techinigue you could use to xcopy your vfp COM objects in folders and run many instances/versions of the same object (with the same ProgID and ClassID).