First Step Up A Event Dispatcher In Your Lets Say Wanting To Cast To Bp, I Want For Example To Run A Custom Event In An Actor BP And From Widget Class I Want To Call This Event When I Press A Button, For Example, Its A Very Optimized Way Of Doing Things, Here Are Some Photos:
This Is In Actor BP, I Set Up Dispatch (Made One) And I Dragged In The Event Of It, Then, We Tell It To Do Something From This BP When We Press Button From Other BP,
Now, The Other BP, Widget BP Where A Button Will Be Pressed: