Donno

import xbmcgui

ACTION_PREVIOUS_MENU					= 10

"""
    Biggest problem is no good way to make sure the id your getting exists or is the correct type
    Im not sure how the rest of XBMC handles this (if a skinner gives a button instead of a list control
"""

class WindowXML(xbmcgui.WindowXML):
    def init(self):
        """
        This function should be executed by XBMC after the xml has bene loaded
        """
        if (self.getControl(3).getType() == "list"):   # this doubles checks that  <control id="3" type="list"> so we don't make mistakes [design flaw needs rethinking
            self.listctrl = self.getControl(3)
            self.listctrl.addItem("hey")
            self.listctrl.addItem("hey2")
            self.listctrl.addItem("hey3")
            self.listctrl.addItem("hey4")

    def onAction(self, action):
        """"
            onAction in WindowXML works same as on a Window or WindowDialog its for keypress/controller buttons etc
        """
        if action == ACTION_PREVIOUS_MENU:
            self.close()  
    
    def onClick(self, controlID):
        """"
            onClick is used instead of onControl
        """
        if (controlID == 4):
            print "Some Control with id 4 was pressed"
        if (controlID == 3):
            print "The list was pressed"


    def onFocus(self, controlID):
        """"
            onFocus is a totally new type
        """
        if (controlID == 5):
            print 'The control with id="5" just got focus'

w = WindowXML("Youtube_Window.xml")
w.doModal()
del w