How do I embed OpenOffice Calc into my own application?

I would like to provide spreadsheet capability in m开发者_运维技巧y Cocoa application. From what I've heard, OpenOffice does allow some level of embedding, but I'll be darned if I can find that information in their official SDK documentation. Can anyone here point me in the right direction?

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There are some alternatives just none for Objective-C that I know of.

1. Java - you can use the OOoBean to embed any type of OO document - it works.
2. C++ / win32 - see this example on codeproject for a windows embedding (WTL)
3. Finally you can study the source code of OpenOffice for Mac itself