click a button to build a structure

[Jenssons]

could some one help me i made a button on the ui and when i click it i would like a trigger to happen where i can place the structure on the map (like C&C) no need for workers



and i know this can be done

 

[jesse]

im currently trying to figure out how to add a row of buttons to user interface
i found this might help

or this
https://sc2mapster.gamepedia.com/UI_Editor