/// <summary>
/// Sends a e-mail using default Windows mail client
/// </summary>
/// <param name="Subject"></param>
/// Message subject
/// <param name="Body"></param>
/// Message body
/// <param name="Originator"></param>
/// Source user mail
/// <param name="OriginatorName"></param>
/// Source user name
/// <param name="Recipient"></param>
/// Destination e-mail address, multiple addresses separated by semicolon
/// <param name="RecipientName"></param>
/// Destination name,multiple destination names separated by semicolon
/// <param name="file"></param>
/// File name the destination user will see, multiple names separated by semicolon
/// <param name="originalfile"></param>
/// Full path to the file to send, multiple filesnames separated by semicolon
/// <param name="showmessage"></param>
/// Show the message to the user before sending it
/// <returns></returns>
public static uint SendMail(string Subject, string Body, string Originator,
string OriginatorName, string Recipient, string RecipientName, string file, string originalfile, bool showmessage)
{
uint ulResult = 0;
IntPtr hSession = IntPtr.Zero;
// uint ulFlags = MAPI.MAPI_LOGON_UI | MAPI.MAPI_NEW_SESSION;
ulResult = MAPI.Logon(IntPtr.Zero, null, null, 0, 0, ref hSession);
if (Originator == null)
{
Originator = "";
}
if (Recipient == null)
{
Recipient = "";
}
if (file == null)
{
file = "";
}
if (originalfile == null)
{
file = "";
}
if (originalfile == "")
{
file = "";
}
if (ulResult == MAPI.SUCCESS_SUCCESS)
{
MapiMessage message = new MapiMessage();
message.lpszSubject = Subject;
message.lpszNoteText = Body;
try
{
if (Originator == "")
{
message.lpOriginator = IntPtr.Zero;
}
else
{
message.lpOriginator = AllocOrigin(OriginatorName, Originator);
}
if (Recipient == "")
{
message.lpRecips = IntPtr.Zero;
message.nRecipCount = 0;
}
else
{
uint recipcount = 1;
message.lpRecips = AllocRecips(RecipientName, Recipient, ref recipcount);
message.nRecipCount = recipcount;
}
if (file == "")
{
message.lpFiles = IntPtr.Zero;
message.nFileCount = 0;
}
else
{
uint filecount = 1;
message.lpFiles = AllocFiles(file, originalfile, ref filecount);
message.nFileCount = filecount;
}
UInt32 sendFlags = 0;
if (showmessage)
{
sendFlags = MAPI_DIALOG;
}
ulResult = MAPI.MAPISendMail(hSession, IntPtr.Zero, message, sendFlags, 0);
if (ulResult == MAPI.SUCCESS_SUCCESS)
{
ulResult = MAPI.Logoff(hSession, IntPtr.Zero, 0, 0);
}
else
{
MAPI.Logoff(hSession, IntPtr.Zero, 0, 0);
}
}
finally
{
if (message.lpOriginator != IntPtr.Zero)
{
Marshal.FreeHGlobal(message.lpOriginator);
}
if (message.lpRecips != IntPtr.Zero)
{
Marshal.FreeHGlobal(message.lpRecips);
}
if (message.lpFiles != IntPtr.Zero)
{
Marshal.FreeHGlobal(message.lpFiles);
}
}
}
return(ulResult);
}
private static extern UInt32 MAPISendMail(IntPtr lhSession, IntPtr ulUIParam,
MapiMessage lpMessage, UInt32 flFlags, UInt32 ulReserved);