If I copy a graph from Excel (2007) and choose Paste Special in another Office app, I see a clipboard format called "Microsoft Office Graphic Object", which allows different customizations than Enhanced Metafiles. How do I create such a clipboard object from my own (C++) app so it gets the first-class treatment from Office app?
It's not so important that the chart data be linked like it is within Office apps -- I just want to offer another graph export option.
ClipSpy reports several binary formats including "Excel 2007 Internal Shape", "Embed Source" and "Art::GVML ClipFormat". I guess these are proprietary and private, but in case anyone knows of docs, please let me know.