/// <summary>
/// The MAPISaveMail function saves a message into the message store.
/// </summary>
[DllImport("MAPI32.DLL", CharSet=CharSet.Ansi)]
public static extern uint MAPISaveMail(IntPtr lhSession, IntPtr ulUIParam,
MapiMessage lpMessage, uint flFlags, uint ulReserved, string lpszMessageID);