How to: Specify an Internet Encoding Scheme for the Body and Attachments of a Message

How to: Specify an Internet Encoding Scheme for the Body and Attachments of a Message

This topic shows how to use the MAPI property, PR_INETMAIL_OVERRIDE_FORMAT, and the Outlook object model to specify an Internet encoding scheme for the Exchange Internet Mail Service (IMS) to encode the body and attachments of a mail item.

The following code sample in Visual C# shows how to reference PR_INETMAIL_OVERRIDE_FORMAT with its MAPI proptag namespace and use the PropertyAccessor object of the Outlook object model to specify MIME as the Internet encoding scheme for a message. PR_INETMAIL_OVERRIDE_FORMAT is referenced as:

where 0x59020003 is the proptag of PR_INETMAIL_OVERRIDE_FORMAT.

  private void SendMail_Click()
    Outlook.NameSpace objSession;
    Outlook.MailItem objMailItem;
    Outlook.Recipient objRecipient;
    Outlook.PropertyAccessor oPA;
string Recipient, MsgSubject, ImageFile, TextFile, FileLocation, PropName;
int EncodingFlag;

//Modify the following to appropriate values.
Recipient = "";
EncodingFlag = 1; //Use MIME encoding
MsgSubject = "Test Encoding";
ImageFile = "garden.jpg";
TextFile = "mytext.txt";
FileLocation = "c:\\";

objSession = Application.GetNamespace("MAPI");
objSession.Logon(null, null, true, null);

objMailItem = Application.CreateItem(
            Outlook.OlItemType.olMailItem) as Outlook.MailItem;
objMailItem.Subject = MsgSubject;
objMailItem.Body = "body";
objMailItem.Attachments.Add(FileLocation + TextFile, 
    Outlook.OlAttachmentType.olByValue, 1, TextFile);
objMailItem.Attachments.Add(FileLocation + ImageFile,
    Outlook.OlAttachmentType.olByValue, 1, ImageFile);

objRecipient = objMailItem.Recipients.Add(Recipient);

PropName = "";
oPA = objMailItem.PropertyAccessor;
oPA.SetProperty(PropName, EncodingFlag);