'宣言 Protected Overridable Sub OnBusyStateChanged()
'使用法 Dim instance As C1DocumentSource instance.OnBusyStateChanged()
protected virtual void OnBusyStateChanged()
'宣言 Protected Overridable Sub OnBusyStateChanged()
'使用法 Dim instance As C1DocumentSource instance.OnBusyStateChanged()
protected virtual void OnBusyStateChanged()