Click on the button

Hi,
i am developing my first app using VC++. I am not using MFC.
I am not being able to catch the clicks on the push buttons which
i have shown on parent window. I know how to process the
mesages like WM_LBUTTONUP but i am not being able to catch it
on the push button.
Please help.
Thanks in advance.

WM_COMMAND

thanks but this is the same messge which is used to process
menu messages. how can i detect that it is from pushbutton
which is child of the main window.