Realisieren von Multiselect bei Drag and Drop

Private Sub ListBox2_BeforeDragOver(ByVal Cancel As MSForms.ReturnBoolean, ByVal Data As _
MSForms.DataObject, ByVal X As Single, ByVal Y As Single, ByVal DragState As Long, _
ByVal Effect As MSForms.ReturnEffect, ByVal Shift As Integer)
Cancel = True
Effect = 1
End Sub

Private Sub ListBox2_BeforeDropOrPaste(ByVal Cancel As MSForms.ReturnBoolean, _
ByVal Action As Long, ByVal Data As MSForms.DataObject, ByVal X As Single, _
ByVal Y As Single, ByVal Effect As MSForms.ReturnEffect, ByVal Shift As Integer)
Cancel = False
Effect = 1
ListBox2.AddItem Data.GetText
If ListBox1.ListCount >= 1 Then ListBox1.RemoveItem (ListBox1.ListIndex)
End Sub

Private Sub ListBox1_MouseMove(ByVal Button As Integer, ByVal Shift As Integer, ByVal X As  _
Single, ByVal Y As Single)
Dim MyDataObject As DataObject
If Button = 1 Then
Set MyDataObject = New DataObject
Dim Effect As Integer
MyDataObject.SetText ListBox1.Value
Dim i As Integer
Effect = MyDataObject.StartDrag
End If
End Sub

Hat jemand ne Idee woran`s liegt?
Danke im Voraus
Lorenz