'宣言 Protected Overridable Function CreateDocument() As C1Document
'使用法 Dim instance As C1DocumentSource Dim value As C1Document value = instance.CreateDocument()
protected virtual C1Document CreateDocument()
'宣言 Protected Overridable Function CreateDocument() As C1Document
'使用法 Dim instance As C1DocumentSource Dim value As C1Document value = instance.CreateDocument()
protected virtual C1Document CreateDocument()