Although it sound obvious once known it was quite a surprise for me.
An example is better than a long sentence :
[kml_flashembed movie=”http://www.metah.ch/blog/image/fp_soClass.swf” height=”250″ width=”430″/]
Here you can notice that to access the Size() of a SO you need :
but to get access to the MaxSize() of SO you need to do :
It just mean that you can access the size() of the _so object, but you get the MaxSize() from the SO Class.