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ItemAdded 事件

       

该主题中的某些内容可能不适用于某些语言。

当从 Visual Basic 中将一个引用添加到项目中时,ItemAdded 事件发生。

说明

ItemAdded 事件只有从代码添加引用时才会发生。执行以下操作添加引用时,该事件不会发生:当“模块”窗口为活动窗口时,单击“工具”菜单中的“引用”,显示“引用”对话框后,在“引用”对话框中添加引用。

示例

以下示例包含 ItemAdded 与 ItemRemoved 事件的事件过程。若要试用该示例,请先新建一个类模块,方法是:单击“插入”菜单中的“类模块”,然后将下列代码粘贴到类模块中,并将模块保存为 RefEvents:

' Declare object variable to represent References collection.
Public WithEvents evtReferences As References

' When instance of class is created, initialize evtReferences
' variable.
Private Sub Class_Initialize()
    Set evtReferences = Application.References
End Sub

' When instance is removed, set evtReferences to Nothing.
Private Sub Class_Terminate()
    Set evtReferences = Nothing
End Sub

' Display message when reference is added.
Private Sub evtReferences_ItemAdded(ByVal Reference As _
        Access.Reference)
    MsgBox "Reference to " & Reference.Name & " added."
End Sub

' Display message when reference is removed.
Private Sub evtReferences_ItemRemoved(ByVal Reference As _
        Access.Reference)
    MsgBox "Reference to " & Reference.Name & " removed."
End Sub

以下的 Function 过程可用来添加一个特定的引用。在添加引用时,将执行 RefEvents 类中定义的 ItemAdded 事件过程。

例如,若要将引用设为日历控件,可以传递“C:\Windows\System\Mscal.ocx”字符串(只要该字符串是日历控件在计算机上的正确位置)。

' Create new instance of RefEvents class.
Dim objRefEvents As New RefEvents

' Pass file name and path of type library to this procedure.
Function AddReference(strFileName As String) As Boolean
    Dim ref As Reference

    On Error GoTo Error_AddReference
    ' Create new reference on References object variable.
    Set ref = objRefEvents.evtReferences.AddFromFile(strFileName)
    AddReference = True

Exit_AddReference:
    Exit Function

Error_AddReference:
    MsgBox Err & ": " & Err.Description
    AddReference = False
    Resume Exit_AddReference
End Function