傳送行事曆的共用邀請

共用訊息，包括共用邀請、共用要求和共用回應，會由 SharingItem 物件在 Microsoft Outlook 中表示。 NameSpace物件的CreateSharingItem方法可用來建立共用邀請和共用要求的SharingItem物件。

本範例會使用 OpenSharingItem 方法來建立 SharingItem，代表 [行事曆] 預設資料夾的共用邀請。 共用之後，收件者就可以使用NameSpace物件的OpenSharedFolder或GetSharedDefaultFolder方法，或使用SharingItem物件的OpenSharedFolder方法來開啟共用資料夾。

1. 此範例會使用NameSpace物件的GetDefaultFolder方法，取得目前使用者之Calendar預設資料夾的Folder物件參照。

2. 它會使用 CreateSharingItem 方法來建立新的 SharingItem 物件，並使用 Folder 物件來建立 SharingItem 所用的共用內容。

3. 最後，會呼叫新建立之SharingItem物件之Recipients集合的Add方法來新增指定的收件者，並使用Send方法來傳送SharingItem。

Public Sub ShareCalendarByInvitation() 
 Dim oNamespace As NameSpace 
 Dim oFolder As Folder 
 Dim oSharingItem As SharingItem 
 
 On Error GoTo ErrRoutine 
 
 ' Get a reference to the Calendar default folder 
 Set oNamespace = Application.GetNamespace("MAPI") 
 Set oFolder = oNamespace.GetDefaultFolder(olFolderCalendar) 
 
 ' Create a new sharing invitation, using the Calendar 
 ' default folder to establish sharing context. 
 Set oSharingItem = oNamespace.CreateSharingItem(oFolder) 
 
 ' Add a recipient to the Recipients collection of 
 ' the sharing invitation. 
 oSharingItem.Recipients.Add "someone@example.com" 
 
 ' Send the sharing invitation. 
 oSharingItem.Send 
 
EndRoutine: 
 On Error GoTo 0 
 Set oSharingItem = Nothing 
 Set oFolder = Nothing 
 Set oNamespace = Nothing 
Exit Sub 
 
ErrRoutine: 
 Select Case Err.Number 
 Case 287 ' &H0000011F 
 ' The user denied access to the Address Book. 
 ' This error occurs if the code is run by an 
 ' untrusted application, and the user chose not to 
 ' allow access. 
 MsgBox "Access to Outlook was denied by the user.", _ 
 vbOKOnly, _ 
 Err.Number & " - " & Err.Source 
 Case -313393143 ' &HED520009 
 ' This error typically occurs if you set the 
 ' AllowWriteAccess property of a SharingItem 
 ' to True when sharing a default folder. 
 MsgBox Err.Description, _ 
 vbOKOnly, _ 
 Err.Number & " - " & Err.Source 
 Case -2147467259 ' &H80004005 
 ' This error typically occurs if the SharingItem 
 ' cannot be sent because of incorrect or 
 ' conflicting property settings. 
 MsgBox Err.Description, _ 
 vbOKOnly, _ 
 Err.Number & " - " & Err.Source 
 Case Else 
 ' Any other error that may occur. 
 MsgBox Err.Description, _ 
 vbOKOnly, _ 
 Err.Number & " - " & Err.Source 
 End Select 
 
 GoTo EndRoutine 
End Sub

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