int SendMail(string strSubject, string strBody, int how)
{
MapiMessage msg = new MapiMessage();
msg.subject = strSubject;
msg.noteText = strBody;
msg.recips = GetRecipients(out msg.recipCount);
msg.files = GetAttachments(out msg.fileCount);
m_lastError = MAPISendMail(new IntPtr(0), new IntPtr(0), msg, how,
0);
if (m_lastError > 1)
MessageBox.Show("MAPISendMail failed! " + GetLastError(),
"MAPISendMail");
Cleanup(ref msg);
return m_lastError;
}
static extern int MAPISendMail(IntPtr sess, IntPtr hwnd,
MapiMessage message, int flg, int rsv);
void Cleanup(ref MapiMessage msg)
{
int size = Marshal.SizeOf(typeof(MapiRecipDesc));
int ptr = 0;
if (msg.recips != IntPtr.Zero)
{
ptr = (int)msg.recips;
for (int i = 0; i < msg.recipCount; i++)
{
Marshal.DestroyStructure((IntPtr)ptr,
typeof(MapiRecipDesc));
ptr += size;
}
Marshal.FreeHGlobal(msg.recips);
}
if (msg.files != IntPtr.Zero)
{
size = Marshal.SizeOf(typeof(MapiFileDesc));
ptr = (int)msg.files;
for (int i = 0; i < msg.fileCount; i++)
{
Marshal.DestroyStructure((IntPtr)ptr,
typeof(MapiFileDesc));
ptr += size;
}
Marshal.FreeHGlobal(msg.files);
}
m_recipients.Clear();
m_attachments.Clear();
m_lastError = 0;
}