Thank you for your great answer. I understand that what is QuickBooks web connector. I installed it my machine. here, I want one more clarification where I find the .QWC file .may I design the web service for a .qwc file. if yes, how can I create it.i have one web application? I take the data from there to QuickBooks desktop application.here, how I create a .qwc file I saw a .qwc file in my SDK package .what is owner id, app id in a .qwc file. how i going to build the .qwc file .can you please help me