hikaro

I'm looking for a graphical XML editor, I just recently got into creating my own UI and have found several aspects of diffrent ones I like and I want to combine them to get a UI that I can use but there is only one problem... I know squat about xml. As far as the text xml editors go well they are pointless cause they give me no added functionality that I can't get out of notepad. So I am trying to find an editor that can show me what the boxes and what not I am editing will look like without me having to log into the game. Thanks for your help