extern public static int lineGetRadioPresence( IntPtr hLine, out LINERADIOPRESENCE lpdwRadioPresence );
public static extern int lineGetRadioPresence( IntPtr hLine, out LINERADIOPRESENCE lpdwRadioPresence );
extern public static int lineGetRadioPresence( IntPtr hLine, out LINERADIOPRESENCE lpdwRadioPresence );
public static extern int lineGetRadioPresence( IntPtr hLine, out LINERADIOPRESENCE lpdwRadioPresence );