EMC API?

I am very interested in EMC. Id like to tinker with the GUI part of the
system- Ive done a Mill Power kind of clone alerady under Win95, Id like
to move that to EMC, maybe with Tk or Java. I assume there is a
programmer interface- API- soewhere in EMC that can be used this way,
but so far I havent found any docs about it.

can soeone give me a pointer to the right docs?

What seems to be really missing to me is a sort of overview doc that
describes all the pieces and how they work together- the WEB page junps
right to a description of an .ini file and lots of gory details, but
never explains the basic structure of things.

ron