the Event Based UI page is a little ambiguous for newcomers. In Example 3 there is an image with the function ‘SetPercent’ but there isn’t really anywhere that explains where that function is created, or where it is bound. It may be suck eggs for anyone who has been using the engine for a while but I think the content on this page can be fleshed out a bit, and links provided to other documentation pages for concepts mentioned, like event dispatchers, custom events and blueprint functions.