Distinguish between SendMessage & Keypress

I'm not sure if it's possible, if not then please don't flame me :) I'm noobie yet.

I would like to filter keyboard event's coming from SendMessage or PostMessage, and deny them. I'm working in VS2013 C++ (Win8.1).

Could you give me a point where I could start at? Thank you.

Solution

So, it's hardly possible at all. Thank you, question answered.

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