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Imports System.Runtime.InteropServices
Namespace SendFileTo
Public Class SendFileTo
Class MAPI
Public Function AddRecipientTo(ByVal email As String) As Boolean
Return AddRecipient(email, howTo.MAPI_TO)
End Function
Public Function AddRecipientCC(ByVal email As String) As Boolean
Return AddRecipient(email, howTo.MAPI_CC)
End Function
Public Function AddRecipientBCC(ByVal email As String) As Boolean
Return AddRecipient(email, howTo.MAPI_BCC)
End Function
Public Sub AddAttachment(ByVal strAttachmentFileName As String)
m_attachments.Add(strAttachmentFileName)
End Sub
Public Function SendMailPopup(ByVal strSubject As String,
ByVal strBody As String) As Integer
Return SendMail(strSubject, strBody, MAPI_LOGON_UI Or MAPI_DIALOG)
End Function
Public Function SendMailDirect(ByVal strSubject As String,
ByVal strBody As String) As Integer
Return SendMail(strSubject, strBody, MAPI_LOGON_UI)
End Function
<DllImport("MAPI32.DLL")> _
Private Shared Function MAPISendMail(ByVal sess As IntPtr,
ByVal hwnd As IntPtr, ByVal message As MapiMessage,
ByVal flg As Integer, ByVal rsv As Integer) As Integer
End Function
Private Function SendMail(ByVal strSubject As String,
ByVal strBody As String, ByVal how As Integer) As Integer
Dim msg As MapiMessage = New MapiMessage()
msg.subject = strSubject
msg.text = strBody.Trim
msg.recips = GetRecipients(msg.recipCount)
msg.files = GetAttachments(msg.fileCount)
m_lastError = MAPISendMail(New IntPtr(0), New IntPtr(0), msg, how, 0)
If m_lastError > 1 Then
MessageBox.Show("MAPISendMail failed! " + GetLastError(),
"MAPISendMail")
End If
Cleanup(msg)
Return m_lastError
End Function
Private Function AddRecipient(ByVal email As String,
ByVal howTo As howTo) As Boolean
Dim recipient As MapiRecipDesc = New MapiRecipDesc()
recipient.recipClass = CType(howTo, Integer)
recipient.name = email
m_recipients.Add(recipient)
Return True
End Function
Private Function GetRecipients(ByRef recipCount As Integer) As IntPtr
recipCount = 0
If m_recipients.Count = 0 Then
Return 0
End If
Dim size As Integer = Marshal.SizeOf(GetType(MapiRecipDesc))
Dim intPtr As IntPtr = Marshal.AllocHGlobal(
m_recipients.Count * size)
Dim ptr As Integer = CType(intPtr, Integer)
Dim mapiDesc As MapiRecipDesc
For Each mapiDesc In m_recipients
Marshal.StructureToPtr(mapiDesc, CType(ptr, IntPtr), False)
ptr += size
Next
recipCount = m_recipients.Count
Return intPtr
End Function
Private Function GetAttachments(ByRef fileCount As Integer) As IntPtr
fileCount = 0
If m_attachments Is Nothing Then
Return 0
End If
If (m_attachments.Count <= 0) Or (m_attachments.Count >
maxAttachments) Then
Return 0
End If
Dim size As Integer = Marshal.SizeOf(GetType(MapiFileDesc))
Dim intPtr As IntPtr = Marshal.AllocHGlobal(
m_attachments.Count * size)
Dim mapiFileDesc As MapiFileDesc = New MapiFileDesc()
mapiFileDesc.position = -1
Dim ptr As Integer = CType(intPtr, Integer)
Dim strAttachment As String
For Each strAttachment In m_attachments
mapiFileDesc.name = IO.Path.GetFileName(strAttachment)
mapiFileDesc.path = strAttachment
Marshal.StructureToPtr(mapiFileDesc, CType(ptr, IntPtr), False)
ptr += size
Next
fileCount = m_attachments.Count
Return intPtr
End Function
Private Sub Cleanup(ByRef msg As MapiMessage)
Dim size As Integer = Marshal.SizeOf(GetType(MapiRecipDesc))
Dim ptr As Integer = 0
If msg.recips <> IntPtr.Zero Then
ptr = CType(msg.recips, Integer)
Dim i As Integer
For i = 0 To msg.recipCount - 1 Step i + 1
Marshal.DestroyStructure(CType(ptr, IntPtr),
GetType(MapiRecipDesc))
ptr += size
Next
Marshal.FreeHGlobal(msg.recips)
End If
If msg.files <> IntPtr.Zero Then
size = Marshal.SizeOf(GetType(MapiFileDesc))
ptr = CType(msg.files, Integer)
Dim i As Integer
For i = 0 To msg.fileCount - 1 Step i + 1
Marshal.DestroyStructure(CType(ptr, IntPtr),
GetType(MapiFileDesc))
ptr += size
Next
Marshal.FreeHGlobal(msg.files)
End If
m_recipients.Clear()
m_attachments.Clear()
m_lastError = 0
End Sub
Public Function GetLastError() As String
If m_lastError <= 26 Then
Return errors(m_lastError)
End If
Return "MAPI error [" + m_lastError.ToString() + "]"
End Function
ReadOnly errors() As String = New String() {"OK [0]", "Annullato dall'utente [1]",
"Errore generale MAPI [2]", "Accesso MAPI fallito [3]",
"Disco pieno [4]", "Memoria insufficente [5]", "Accesso negato [6]",
"-sconosciuto- [7]", "Troppe sessioni [8]",
"Sono stati specificati troppi files [9]",
"Sono stati specificati troppi destinatari [10]",
"L'allegato specificato non è disponibile [11]",
"Apertura allegato fallita [12]", "Scrittura dell'allegato fallita [13]",
"Destinatario sconosciuto [14]", "Tipo di destinatario non corretto [15]",
"Nessun messaggio [16]", "Messaggio non valido [17]", "Testo troppo grande [18]",
"Sessione non valida [19]", "Tipo non supportato [20]",
"Uno dei destinatari specificati è ambiguo [21]",
"Messaggio in uso [22]", "Errore di rete [23]",
"Campi di modifica non vallidi [24]", "Destinatari non validi [25]",
"Non supportato [26]"}
Dim m_recipients As New List(Of MapiRecipDesc)
Dim m_attachments As New List(Of String)
Dim m_lastError As Integer = 0
Private Const MAPI_LOGON_UI As Integer = &H1
Private Const MAPI_DIALOG As Integer = &H8
Private Const maxAttachments As Integer = 20
Enum howTo
MAPI_ORIG = 0
MAPI_TO
MAPI_CC
MAPI_BCC
End Enum
End Class
<StructLayout(LayoutKind.Sequential)> _
Public Class MapiMessage
Public reserved As Integer
Public subject As String
Public text As String
Public messageType As String
Public dateReceived As String
Public conversationID As String
Public flags As Integer
Public originator As IntPtr
Public recipCount As Integer
Public recips As IntPtr
Public fileCount As Integer
Public files As IntPtr
End Class
<StructLayout(LayoutKind.Sequential)> _
Public Class MapiFileDesc
Public reserved As Integer
Public flags As Integer
Public position As Integer
Public path As String
Public name As String
Public type As IntPtr
End Class
<StructLayout(LayoutKind.Sequential)> _
Public Class MapiRecipDesc
Public reserved As Integer
Public recipClass As Integer
Public name As String
Public address As String
Public eIDSize As Integer
Public enTryID As IntPtr
End Class
End Class
End Namespace
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