CRM plugin to update attachment

Is it possible to have a plugin or workflow change the properties off a word document when it’s uploade开发者_如何学Pythond to an entities notes. For example, add the GUID of the letter activity to the word document attached to it?

Thanks for your help in advanced.

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Well, any file (note) is stored in binary in crm db, so you would have to use a framework (maybe aspose or somathing free) to load word document into some kind of object model and then change whatever you like.