Virtually pressing a button

How do I virtually press this button? (HWND hMyButton)

SendMessage() and use BN_CLICKED

Like this:?

SendMessage(hMyButton, BN_CLICKED, 1, NULL);

more like....

SendMessage(hDialog, WM_COMMAND, MAKEWPARAM(ID_MYBUTTON, BN_CLICKED) , hwndMyButton );

should have MAKEWPARAM() ( and MAKELPARAM() ) from including Windows.h

Okay, I got it, thanks.