The HDN_ITEMCHANGED notification message notifies a header control's parent window that the attributes of a header item have changed. This notification message is sent in the form of a WM_NOTIFY message.
HDN_ITEMCHANGED
phdr = (HD_NOTIFY FAR *) lParam;
Parameters
phdr
Pointer to an HD_NOTIFY structure that contains information about the header control, including the attributes that have changed.
Return Values
No return value.
See Also