Some time ago I started a program called "MUIDesigner".
MUIDesigner.png

Which should ease the creating of MUI GUIs or "experimenting" with designs you had im your mind w/o the need to write a program and do all the stuff by hand.

It would export the MUI GUI as a xml file like they are used in Hollywood.
Which could then be loaded by any program.

There was also planned to wrote a small program which would load the xml file open the gui and do some simple actions depending on user input, like starting a program if the user presses button xy f.e.

Creating a basic MUI tree works, what's missing is adding all those attributes/notifies etc and the preview.
Exporting as xml/c-source was started.