Mapi.cs :  » SQL-Clients » Database-Commander » YariSoft » Utils » C# / CSharp Open Source

using System;
using System.Runtime.InteropServices;

namespace YariSoft.Utils{

  public class Mapi
  {
    [StructLayout( LayoutKind.Sequential, CharSet=CharSet.Ansi )]
    private class MapiRecipDesc
    { 
      public int    ulReserved      = 0;
      public int    ulRecipClass    = 1;      
      public string  lpszName      = ""; 
      public string  lpszAddress      = "";      
      public int    ulEIDSize      = 0; 
      public IntPtr  lpEntryID      = IntPtr.Zero;      
      
      public MapiRecipDesc()
      {
      }

      public MapiRecipDesc( string Address, int RecipClass ):this()
      {
        this.lpszAddress = Address;
        this.ulRecipClass = RecipClass;
      }
    } 

    [StructLayout( LayoutKind.Sequential, CharSet=CharSet.Ansi )]
    private class MapiMessage 
    { 
      public int    ulReserved      = 0;      
      public string  lpszSubject      = "";      
      public string  lpszNoteText    = "";      
      public string  lpszMessageType    = ""; 
      public string  lpszDateReceived  = ""; 
      public string  lpszConversationID  = "";      
      public int    flFlags        = 0;      
      public object  lpOriginator    = null;
      public int    nRecipCount      = 0;      
      public IntPtr  lpRecips      = IntPtr.Zero;      
      public int    nFileCount      = 0;      
      public object  lpFiles        = null;           
      
      public MapiMessage()
      {
      }

      public void Dispose()
      {
        this.DeleteMapiRecipDesc();
      }

      public MapiMessage( string Address, string Subject, string NoteText ):this()
      {
        this.lpszSubject  = Subject;
        this.lpszNoteText  = NoteText;
        this.nRecipCount  = 1;  

        this.AllocateMapiRecipDesc ( Address, ref this.lpRecips, 1 );
      }

      private void AllocateMapiRecipDesc( string Address, ref IntPtr Pointer, int RecipClass )
      {
        MapiRecipDesc recip = new MapiRecipDesc ( Address, RecipClass );
        IntPtr ptr      = Marshal.AllocHGlobal( Marshal.SizeOf( typeof( MapiRecipDesc )));
        Marshal.StructureToPtr( recip, ptr, false );
        Pointer        = ptr;
        return;
      }


      private void DeleteMapiRecipDesc()
      {
        if( this.lpRecips != IntPtr.Zero ){
          Marshal.DestroyStructure( this.lpRecips, typeof(MapiRecipDesc) );
          Marshal.FreeHGlobal( this.lpRecips );
        }  
      }
    } 

    [System.Runtime.InteropServices.DllImport( "MAPI32.DLL")]
    private static extern int MAPISendMail(  int      lhSession, 
                        int      ulUIParam,
                        MapiMessage lpMessage,
                        int      flFlags, 
                        int      ulReserved );

    public static int Send( string Address, string Subject, string Text, bool Anonymous )
    {
      int result = 0;
      MapiMessage lpMessage = new MapiMessage ( Address, Subject, Text );
      try{
        result = MAPISendMail( 0, 0, lpMessage, 0, 0 );  
      } finally{
        lpMessage.Dispose();
      }
      return result;
    }
  }
}