With help of API we have developed a custom program which is .exe output (VB13).
Now I want to know how can I incorporate the same in EPDM. Kindly guide me on the same.
I'm not really sure what you're asking here. Are you asking how to modify your code to run as an EPDM add-in?
If you haven't already done so, I suggest you take a look at the Help. This is publicly available and gives examples of regular Enterprise add-ins and Enterprise Task add-ins. 2015 SOLIDWORKS API Help - Getting Started
You can find additional samples here: https://forum.solidworks.com/community/api/content?filterID=contentstatus%5Bpublished%5D~objecttype~objecttype%5Bdocument%5D
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