How to build on another platforms with the same code base ?

I have created a cocos2d-x project on multi-platforms base on this tutorial http://www.cocos2d-x.org/wiki/How_to_create_a_multi-platform_project_in_one_command_line

Then I made a game on Windows platforms (win32), I used Visual Studio 2012 to made it.

Now, I need to build it on another platforms like Windows Phone, IOS, Android… . How can I do that ?

for Windows Phone you should open *sln file of project for wp8
for iOs you need in X-Code