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我正在尝试扩展TextBox,ComboBox和Panel控件使用IExtenderProvider，但我无法让它正常工作。我开始相信我还没有完全理解这个概念。
TextBox
ComboBox
Panel
IExtenderProvider
有没有人知道网络上有什么好的资源（带有例子）如何IExtenderProvider使用？
http://www.codeproject.com/aspnet/FixingIExtenderProvider.asp http://www.codeproject.com/aspnet/ExtenderProviderComponent.asp