Hello, I need to have within a string, the contrenuto a .txt file.

I must have, at the 'beginning of the frame, an instruction that copies the contents of a .txt file with alphanumeric values ​​into a string on the project mmf2.

I found many solutions to the "load via file", but I need this function is automatic (start to frame to example).
I tried the 'extension "files" but did not succeed.
Please help me