Imports Outlook = Microsoft.Office.Interop.Outlook 
 
Public Class Form1 
    Private OLApp As Outlook.Application 
    Private OlExplorer As Outlook.Explorer 
    Private OlNavigationPan As Outlook.NavigationPane 
    Private CalendarModule As Outlook.CalendarModule 
    Private OlNavigationGroup As Outlook.NavigationGroup 
 
    Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) _ 
        Handles MyBase.Load 
        Dim Process() As System.Diagnostics.Process = System.Diagnostics _ 
            .Process.GetProcessesByName("OUTLOOK") 
 
        If Process.Length > 0 Then 
            OLApp = System.Runtime.InteropServices.Marshal _ 
                .GetActiveObject("Outlook.Application") 
        Else 
            OLApp = New Outlook.Application 
        End If 
 
        If OLApp.ActiveExplorer IsNot Nothing Then 
            OlExplorer = OLApp.ActiveExplorer 
        Else 
            OlExplorer = OLApp.Explorers.Add(OLApp.Session _ 
                .GetDefaultFolder(Outlook.OlDefaultFolders.olFolderInbox)) 
            OlExplorer.Activate() 
        End If 
 
        OlNavigationPan = OlExplorer.NavigationPane 
        CalendarModule = OlNavigationPan.Modules _ 
            .GetNavigationModule(Outlook.OlNavigationModuleType. _ 
                                 olModuleCalendar) 
 
        ComboBox1.Items.Clear() 
 
        OlNavigationGroup = CalendarModule.NavigationGroups("Shared Calendars") 
 
        If OlNavigationGroup IsNot Nothing Then 
            For Each Folder As Outlook.NavigationFolder In OlNavigationGroup _ 
                .NavigationFolders 
                ComboBox1.Items.Add(Folder.DisplayName) 
            Next 
        Else 
            MsgBox("OlNavigationGroup is nothing") 
        End If 
    End Sub 
 
    Private Sub Form1_FormClosed(sender As System.Object, e As System.Windows _ 
        .Forms.FormClosedEventArgs) Handles MyBase.FormClosed 
        If OLApp IsNot Nothing Then 
            System.Runtime.InteropServices.Marshal.ReleaseComObject(OLApp) 
        End If 
    End Sub 
 
    Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) _ 
        Handles Button1.Click 
        Dim OlNavigationFolder As Outlook.NavigationFolder 
 
        If OlNavigationGroup IsNot Nothing Then 
            OlNavigationFolder = OlNavigationGroup _ 
                .NavigationFolders(ComboBox1.SelectedIndex + 1) 
            If OlNavigationFolder IsNot Nothing Then 
                OlNavigationPan.CurrentModule = CalendarModule 
                OlNavigationFolder.IsSelected = True 
            End If 
        Else 
            MsgBox("OlNavigationGroup is nothing") 
        End If 
    End Sub 
End Class 

Shared Calendar 的 MAPIFolder是没有办法获得的。我们只能获得NavigationFolder。


摘自 TX_OfficeDev的专栏