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I followed @bitcube's guide and look @ the change that he made on his commit.
https://github.com/btscube/steem/commit/f2392527a071b0b3b9064a8111468211aa14f18a
There are few more codes change needed on the new source for it to work with VS2013.

Would you mind sharing your VS2013 solution (.sln) You can DM me in steemit.chat (same name)

I will post the list of code change here later.
Because I do not have a Github or steem-chat account(did not sign up one).