MyBB Community Forums

I own a forum where members make programs and sell them.
I've been asked if MyBB has an API so the programmers can add a feedback option in their programs that will use the recipients MyBB login info and post their feedback in a feedback thread for the program.
Obviously the answer is no on an API... but..
has anyone developed a C# or similar language type library class that logins into a MyBB forum, check validity of account credentials, and can make posts to a particular thread ID?
Ideas, thoughts, suggestions?
thank you.

has not been updated in a while but it should still work, at least with minimal upkeep

http://phpdave.com/MyBBIntegrator/

I integrated login into my VB.NET programs to MyBB forums back when I used to make my own programs. You can do it using HTTP web request, google and you'll find it.

As far as posting replies to thread, not done anything like that. Why not tell them to post directly to thread itself or tell the software maker to make a button that links to the thread?

Thanks pavenmen, and good suggestion crazy4cs. This input helps a lot.