GUI application API

[Sascha Retzki]

Hello,

can I use lilypond as a GUI application framework or API to display 
scores?

In a perfect world, I'd like to load a MIDI-file or a Lilypond file,
and use some API calls to display it (of course, this can be done
converting it to a png, then display the png. I'd prefer the first one,
and would like to use Gtk(2)).

If this is possible/trivial, can you link me to the documentation/reference/
man- and infopages?


Thank you,



Sascha Retzki