How to make insert in Opengl c++

Hey. I want to make buttons in OpenGL c++, but have had no luck. I just want a button that has a effect(but not yet) and have a visual of the button being clicked(highlighted area).
Thanks to anyone who took their time to help me do this. Please help will be appreciated. I know I have posted this question 3 times already, it is just because I am not getting any proper answers. Like any external GUI libraries or code.

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