C++ function to show hack hotkeys ingame

I want to make a function that displays a box with my hack hotkeys ingame,but i don´t know how to start programming it..
can someone point me in the right direction..??
i want to make something like this:

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you can use a poxy DLL to do it

Thank you for the reply,but is the correct poxy dll or proxy dll?
what i should look for - search to make my ingame hotkeys box ?
thanks..

try this dude
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