extern public static int lineGetEquipmentState( IntPtr hLine, out int lpdwState, out LINERADIOSUPPORT lpdwRadioSupport );
extern static public int lineGetEquipmentState( IntPtr hLine, out LINEEQUIPSTATE lpdwState, out LINERADIOSUPPORT lpdwRadioSupport );
public static extern int lineGetEquipmentState( IntPtr hLine, out int lpdwState, out LINERADIOSUPPORT lpdwRadioSupport );