How to Fire a Event when a button is clicked ?

This is a problem solved best by watching tutorials on the subject of UMG, widgets, events, dispatchers. I’m not trying to discourage you or anything, but did you even consider that there might be a solution to what you are looking for that can be reached much quicker if you only searched the documentation. In fact, I encourage you to watch tutorials to avoid future complications in your game projects. Plus it is far more interesting to discuss blueprints on forums when you have gained more knowledge on the matter.