SOLVED "Glade Python Gimp: registerproblem"

For one of my plugins I'm rewriting the GUI with Glade (new for me) to get a better user interface divided into logical groups. The problem is that I don't know how to register it for Gimp. The testsource beneath works (XML file is not enclosed) but what have I to add/change for GIMP or has anyone a (small) example for me. I've looked on several forums (Glade, Pyhon, and others) but found nothing usefull.

Elmar

=======================
#!/usr/bin/env python

import pygtk
pygtk.require("2.0")
import sys
import gtk

class Tutorial:

def on_window1_destroy(self, widget, data=None):
gtk.main_quit()

def on_checkbutton1_toggled(self, widget, data=None):
print "button was toggled"
if widget.get_active():
print "True"
else:
print "False"

def __init__(self):
builder = gtk.Builder()
builder.add_from_file("CheckButton.xml")

self.window = builder.get_object("window1")
builder.connect_signals(self)

## def MyPluginName(arg1, arg2,....)
## do the job

if __name__ == "__main__":
editor = Tutorial()
editor.window.show()
gtk.main()
=================================