The record has been set at 2567 developers coding non-stop for 18 hours.
Developers came from different parts of India and beyond to participate in the event hosted by Microsoft building, designing and testing apps for the Windows platform,which commenced last afternoon.
As the clock struck 8 am, the world's largest 'app marathon' was realised.
Paul O'Neill, Vice President Guinness World Records Commercial announced Microsoft's entry into the Guinness world records for the "Most Participants in a Software Development Marathon in One Location".
A certificate validating the record was presented to Jon DeVaan, Corporate Vice President for Windows Development at Microsoft and Bhaskar Pramanik, Chairman, Microsoft Corporation India Pvt. Ltd.
At the closing of the Windows Appfest, O'Neill said, "The spectacle of thousands of developers toiling through the night has demonstrated great commitment to their work."
Pramanik said "This Guinness Record at Windows AppFest is a great accomplishment by all the developers who participated. Over the course of the 18 hours of the Windows AppFest we saw some outstanding talent and many innovative apps being developed".
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