Introduction
You can create custom Microsoft Office Outlook objects and manipulate those objects from within Microsoft Office Outlook 2003 or from another application. You can manipulate Outlook objects by using Microsoft Visual Basic .NET code. This article tells the ways to perform some common tasks used in Outlook by using Visual Basic .NET.

Outlook provides a number of objects and methods for taking advantage of its built-in capabilities. This article include programmatically reading unread messages from the Inbox, deleteing messages and sending messages.

 Read Unread Messages from the Outlook Inbox

This section describes how to use the Microsoft Outlook Object Library to retrieve unread messages from the Outlook Inbox in Visual Basic .NET. One of the methods used in this is the GetDefaultFolder method. Mailbox folders contain all Outlook built-in and custom folders. One of the ways to add a reference to a folder in the Mailbox is to specify one of the enumerations with the GetDefaultFolder method, such as is the case of this procedure, olFolderInbox representing the Inbox.

Dim tempApp As Outlook.Application
Dim tempInbox As Outlook.MAPIFolder
Dim InboxItems As Outlook.Items
Dim tempMail As Object
 'Dim objattachments, objAttach
tempApp = CreateObject("Outlook.Application")
tempInbox = tempApp.GetNamespace("Mapi").GetDefaultFolder(Outlook.OlDefaultFolders.olFolderInbox)
InboxItems = tempInbox.Items
Dim newMail As Outlook.MailItem
For Each newMail In InboxItems
If newMail.UnRead Then
 Dim des As String = newMail.Body
'if u want to delete
 'newMail.Delete()
 End If
 Next

* MAPI is a component provided by Microsoft to help programmers to connect to messaging applications like Outlook or mail server like Exchange

 Delete Messages from the Outlook Inbox

This section describes how to use the Microsoft Outlook 11.0 Object Library to Delete messages from the Outlook Inbox in Visual Basic .NET.

Dim tempApp As Outlook.Application
Dim tempInbox As Outlook.MAPIFolder
Dim InboxItems As Outlook.Items
Dim tempMail As Object
 tempApp = CreateObject("Outlook.Application")
tempInbox = tempApp.GetNamespace("MAPI").GetDefaultFolder(Outlook.OlDefaultFolders.olFolderInbox)
InboxItems = tempInbox.Items
Dim DeleteMail As Outlook.MailItem
For Each newMail In InboxItems
DeleteMail.Delete()
 Next
Send Messages :
This example shows how to send e-mail to Microsoft Outlook using VB.Net

Dim tempApp As New Outlook.Application()
Dim tempNS As Outlook.NameSpace
Dim MailFolder As Outlook.MAPIFolder
tempNS = tempApp.GetNamespace("MAPI")
tempNS.Logon(, , True, True)
Dim newMail As Outlook.MailItem
MailFolder = tempNS.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderOutbox)
newMail = MailFolder.Items.Add(Outlook.OlItemType.olMailItem)
' sent email will be saved in your outbox also
 newMail.Subject = txtSubject.Text
newMail.Body = txtBody.Text
newMail.To = txtTo.Text
newMail.SaveSentMessageFolder = MailFolder
 newMail.Send()
Note : The most improtant point here to performing all tasks is to add a reference to "Microsoft Outlook object library", In case of

Microsoft Outlook 2000, Add "Microsoft Outlook 9.0 object library"
Microsoft Outlook 2002, Add "Microsoft Outlook 10.0 object library"
Microsoft Outlook 2003, Add "Microsoft Outlook 11.0 object library"
Microsoft Outlook 2007, Add "Microsoft Outlook 12.0 object library"