How to scroll a file on texture background?

Hi, Experts:

  I want scrool a big file in a control (like form), and  I paint form's
canvas with a texture, I couldn't find a control can contain a file's
contents. I want use MEMO or RICHEDIT, but they haven't canvas,
I couldn't paint it with my texture.

 Pls help me.! thks.

Your truly


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