How to load .txt file with resurce in a MDI

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C++

Working to an MDI project and now I have to load some text files to my child window, that handles a static control. So I know how to add a bitmap to a static, but I was asking if the same thing working with a text file..?

Can anyone give me a hand.. will be so kind if will be a concrete answer like with show me the right path and how to handle a message inside a static, without any internet links ? maybe an example how it should look like ?

What I have tried:

I didn't try anything since I don't know how to handle a text file ... I was thinking is like adding an image but that doesn't work..