The HDN_ITEMDBLCLICK notification message notifies a header control's parent window that the user double-clicked the control. This notification message is sent in the form of a WM_NOTIFY message. Only header controls that have the HDS_BUTTONS style send this notification.
HDN_ITEMDBLCLICK
pnmhdr = (NMHDR FAR *) lParam;
Parameters
pnmhdr
Pointer to an NMHDR structure that contains the handle and identifier of the header control and the HDN_ITEMDBLCLICK notification code.
Return Values
No return value.
See Also