Using Cocos Builder with Cocos2D-x

Reading the source code for some tests really helps

https://projects.developer.nokia.com/cocos2dxqt/browser/tests/tests/ExtensionsTest/ControlExtensionTest/CCControlButtonTest/CCControlButtonTest.cpp

But by far the most important thing is this documentation:

https://github.com/cocos2d/CocosBuilder/blob/develop/Documentation/4c.%20Connecting%20with%20cocos2d-x.md