Any documentation about CCBReader for cocos2d-x

Hi,

I am big fan of cocos2d-iphone. Now I wanna shift to cocos2d-x. I am having problem while integrating cocosBuilder.

I could not find an official documentation about the CCBReader extension. It seems little different from the objective-c CCBReader.

What is CCNodeLoaderLibrary?
what is SEL_CCControlHandler?

Can somebody tell me where to find the documentation about CCBReader?
Or how to get started with that?

I thought cocos2s-x is actively developed and there will be support on forums…