Hi jason,

Thank you very much for the reply. 

I want to ask you whether is it possible to communicate with QB from my web application without writing a web service?
Actually my web application and QuickBooks Pro are on same machine  and I was able to send request to QB and able to  receive response from QB without writing a service.
So, I couldn't get a clear idea like what would happen incase Quick Books Pro and web application reside in different systems.
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Also, Can you tell me exactly where I need to mention the path of 
QuickBook Company File in my web applciation.

It would be great if you can provide me with this information.

Regards,
Srinivas