Is it possible to use custom resolution for Macbook Pro with Intel HD 4000? I have a 13" Macbook Pro with Intel HD 4000 chipset and I am wondering, if it is possible to set it use higher resolution then 1280 x 800?
No it is not possible. The screen is what is limiting the resolution.

That does mean that you can set up and use an external monitor with higher resolution as you can read on: http://www.apple.com/macbook-pro/specs/