nletwory@kenraali:~/dev/blender$ grep -rn --color=always "Register(" source/blender/python/*
source/blender/python/api2_2x/Draw.c:89:static PyObject *Method_Register( PyObject * self, PyObject * args );
source/blender/python/api2_2x/Draw.c:579:static PyObject *Method_Register( PyObject * self, PyObject * args )
source/blender/python/api2_2x/doc/testbgl.py:35:def ev(evt, val):                      # this is a callback for Draw.Register()
source/blender/python/api2_2x/doc/testbgl.py:43:    Draw.Register(show_win, ev, None)
source/blender/python/api2_2x/doc/testbgl.py:45:Draw.Register(show_win, ev, None)      # start the main loop
source/blender/python/api2_2x/doc/BGL.py:57:  def ev(evt, val):                      # event callback for Draw.Register()
source/blender/python/api2_2x/doc/BGL.py:75:  Draw.Register(show_win, ev, None)      # start the main loop
source/blender/python/api2_2x/doc/Draw.py:73: Draw.Register(gui, event, button_event)  # registering the 3 callbacks
source/blender/python/api2_2x/doc/Draw.py:215:@warn: Inside the windowing loop (after Draw.Register() has been executed and
source/blender/python/api2_2x/doc/Draw.py:226:def Register(draw = None, event = None, button = None):
source/blender/python/api2_2x/doc/Draw.py:657:   Draw.Register(gui, event, None)