/// The MAPILogoff function ends a session with the messaging system.

private static extern uint MAPILogoff(IntPtr lhSession, IntPtr ulUIParam, uint flFlags, uint ulReserved);

''' The MAPILogoff function ends a session with the messaging system.

Private Shared Function MAPILogoff(ByVal lhSession As IntPtr, ByVal ulUIParam As IntPtr, ByVal flFlags As UInteger, ByVal ulReserved As UInteger) As UInteger

        errorCode = MAPILogoff( session, parentWindowPtr , 0, 0 );

        errorCode = MAPILogoff(session, parentWindowPtr, 0, 0)