HOWTO: How to Use MAPI with Visual Basic

• Microsoft Visual Basic Professional and Enterprise Editions for Windows, versions 5.0, 6.0

SUMMARY

This article shows how to create a simple MAPI client program. The article also demonstrates how to display existing messages and how to create and send new messages.

MORE INFORMATION

Through the use of MAPI controls in Visual Basic, it is relatively easy to create a MAPI Client. The following instructions and code show you how:

1. Start up Visual Basic and select a Standard EXE project. On the Project menu, click Components, and select Microsoft MAPI Controls. There are two new icons displayed on the toolbar. Both icons have envelopes; one with a key, the other with a paperclip. These are your MAPI controls.



2. Add these MAPI controls to your form.



3. Add the following items to the form:
   

   
         Four Labels
         Four CommandButtons
         Four TextBoxes
    

   The label captions are as follows:
   

   
         Label1.Caption = "To:"
         Label2.Caption = "SUBJECT:"
         Label3.Caption = "FROM:"
         Label4.Caption = "MESSAGE:"
    




4. Place the TextBoxes in numerical sequence with these labels (side-by- side for labels 1 thru 3, and below for label 4).



5. Label the CommandButtons as follows:
   

       
         Command1.Caption = "<<"
         Command2.Caption = ">>"
         Command3.Caption = "Connect"
         Command4.Caption = "Send"
         Command5.Caption = "Close Session"
     




6. Add the following code to your form:
   

   
         Option Explicit
         Dim X As Long
   
         Private Sub Command1_Click()
   
           If X - 1 < 0 Then
             Else
           X = X - 1
           MAPIMessages1.MsgIndex = X
           Text1.Text = MAPIMessages1.RecipDisplayName
           Text2.Text = MAPIMessages1.MsgSubject
           Text3.Text = MAPIMessages1.MsgOrigDisplayName
           Text4.Text = MAPIMessages1.MsgNoteText
           End If
   
         End Sub
   
         Private Sub Command2_Click()
   
           If X + 1 > MAPIMessages1.MsgCount Then
           X = MAPIMessages1.MsgCount
             Else
           X = X + 1
           MAPIMessages1.MsgIndex = X
           Text1.Text = MAPIMessages1.RecipDisplayName
           Text2.Text = MAPIMessages1.MsgSubject
           Text3.Text = MAPIMessages1.MsgOrigDisplayName
           Text4.Text = MAPIMessages1.MsgNoteText
           End If
   
         End Sub
   
         Private Sub Command3_Click()
           MAPISession1.SignOn
           MAPIMessages1.SessionID = MAPISession1.SessionID
           MAPIMessages1.Fetch
             If MAPIMessages1.MsgCount > 0 Then
               Text1.Text = MAPIMessages1.RecipDisplayName
               Text2.Text = MAPIMessages1.MsgSubject
               Text3.Text = MAPIMessages1.MsgOrigDisplayName
               Text4.Text = MAPIMessages1.MsgNoteText
               Command4.Enabled = True
             Else
               MsgBox "No messages to fetch"
               MAPISession1.SignOff
               Command4.Enabled = False
             End If
   
         End Sub
   
         Private Sub Command4_Click()
   
           MAPIMessages1.Compose
           MAPIMessages1.RecipDisplayName = Text1.Text
           MAPIMessages1.MsgSubject = Text2.Text
           MAPIMessages1.MsgNoteText = Text4.Text
           MAPIMessages1.ResolveName
           MAPIMessages1.Send
   
         End Sub
   
         Private Sub Command5_Click()
   
           MAPISession1.SignOff
           Unload Me
   
         End Sub
    

Additional query words: kbDSupport kbdse kbvbp500 kbVBp600 kbMAPI kbVBp

Keywords          : 
Version           : 
Platform          : WINDOWS 
Issue type        : kbhowto 

Last Reviewed: May 14, 1999