How to get function from standard wow ui

[tobias1919]

Hello.

I am trying to make an addon that can share and import macros between player in-game. I got most of the logic working, but i am now struggling with addon a shift+click function to the standard "MacroButtonX" buttons in the macro-frame. Any suggestions or ideas as to how i modify the function of a wow standard ui element such as the macro buttons?

Thanks on advance!