主要实现气球形式的ToolTip,老外写的,感觉很不错-main forms of ToolTip balloon, a foreigner writing feels really good

建设BallonToolTip提供商在C＃ 演示如何创建一个提示提供支持气球工具提示，其中包括有关创建扩展性能和使用NativeWindow类的问题。-Building a BallonToolTip provider in C# Shows how to create a ToolTip provider that supports Balloon Tooltips, including issues related to creating extender properties an