In a future program I'm planning to support the Open Document Format (ODT) so any "office program" can read it.

But I cannot find any books or tutorials or even how exactly the format looks..
I will be using C++ and probably Qt

Can anyone give me some directions ?

The documents MUST include text AND graphics

thnx

May be you can find something at the official ODF site (I didn't read it though).

Anyway, ODT files are ZIP ones, so change the extension, open with your favorite ZIP extractor and enjoy diving the resulting XML files.

specs are here
http://docs.oasis-open.org/office/v1.2/cs01/OpenDocument-v1.2-cs01.html

I'd recommend using a library.
But if you only need to support a small subset I suppose creating your own implementation is fine.