There is probably no universal solution.
Any COM program can implement an IDataObject by itself, and the data in it can be in a format that you don't understand at all. There is no mandatory rule on where the data should be placed. All you can do is give a format and let the DataObject put it in The data will be transferred and returned to you.
I think your request is wrong. Can you tell me what exactly you want to do?
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There is probably no universal solution.
Any COM program can implement an IDataObject by itself, and the data in it can be in a format that you don't understand at all. There is no mandatory rule on where the data should be placed. All you can do is give a format and let the DataObject put it in The data will be transferred and returned to you.
I think your request is wrong. Can you tell me what exactly you want to do?