I run these basic codes in Python 2.6 interactive window of PythonWin which imports multiprocessing module:-
Code:
    >>> import multiprocessing
    >>> def myfunc():
    ... 	pass
    ... 
    >>> p1 = multiprocessing.Process(name='listen', target=myfunc)
    >>> p1.start()
    >>>
As soon as I call p1.start(), a popup message comes up...