2.70 classes and compatibility

It depends on what you mean by "backward compatibility". Classes usable in the Designer in 2.70 are loaded and initialised when the layout file is loaded at runtime. If used in an earlier version of the IDE they would need to be programmatically loaded and initialised. So while the actual source code of the class is usable in earlier versions the source of the app would need to be modified for the earlier IDE to call Initialize and DesignerCreateView with the appropriate Panel, Label and Map arguments. It's a bit clumsy!

Thanks Andrew,

So 2.52 would not necessarily choke on a 2.70 library or class, it just wouldn't work in the designer? I guess I should just try it and find out.

--- Jem

The download is the source code, not a library.