Is it possible to make dnn custom Registration module using OWS ?

The simple answer is yes.

The more detailed answer is that this might not be the most cost effective approach.

If I understand OWS (and I sure hope that I'll be corrected if I'm wrong about this), you will have to work with database access and stored procedures to do all of the work.  If you were doing this with VB or c#, you would be able to use "business objects."  This will make the process easier, and also insulate you better from changes in the event that upgrades change the database.

I think that the most cost-effective solution is to use something like Dynamic Registration and Dynamic Login, modules that are avaialbe from Data Springs.  You will certainly save time and money (assuming that somebody's time is worth money) going this way.

Thanks a lot, i really appreciate that

I want it in a performance efficient way.

One more thing..... do u think Dynamic Registration and Dynamic Login will be performance efficient as compare to custom development of the whole module ?

Another simple answer:  Yes.

Just to add something else, the next episode in the OWS tutorials is:

How to create a custom login module with OWS (to be released at the beginning of Jan)

So you may find that interesting as well. The DataSprings method will probably be the quickest method to get you set up however.

Thanks alot

Great news!