Dia API documentation

[Daniele Pighin <daniele dcs it>]

Hallo,
I'm trying to put my nose into the UML code to see whether it is possible to 
make UML objects behave somewhat like other objects (for as concernes stroke, 
line colour and so on...).

First, is it possible ?
And if it is, where can I find some documentation about dia API?

Thanks

Daniele