[Zope] Product Question

[Matthew Russell]

Hi all,
have been experimenting with Products of late,
I have a directory: FOO
and in it.
__init__.py with the correct defintion for initialize()
and foo,py with a Product Interface and Implementation a la book.

but I forgot one thing, a line that says :

InitializeClass(MyProduct)

Now, my product works fine <u>without</u> this line, and as I'm a 
curious sort, was wonderiing if anyone could tell me why if you have got 
initialze() in __jnit__.py why one would <i>need</i> to 
InitializeClass() in Product.py??

tia
Matt