Win32 COMBOBOX 'Enter' Key??

I have a general question, how can I trap an 'Enter' Key being pressed after entering text into a combobox? I have tried subclassing the edit window of the combobox just like msdn recommended but that does not seem to be working. If anyone has any suggesstions please shoot them my way. Thanx!

ChildWindowFromPoint is what I was using to retrieve a handle to the edit portion of the combobox. It was a valid handle so I know everything was working fine, except I can not trap any WM_KEYDOWN messages from the window. I tried via the parent window procedure and the child window procedure.