Is it possible to share/post on Facebook from cocos2d-x on windows phone. I am writing in C++.
Yes its possible. You would be need to call your C# code from C++
. You would find many example/Tutorial Regarding post on Facebook in C# using webBrowser. you just call that function from your C++ code. and for how to call C# function from C++ this (use webbroswer to integrate Alipay on Windows Phone 8) Documentation would help you out.