第三个需求Windows Forms的文本框支持
第二个需求在Windows Forms的编程指南里面有示例。
第一个需求不可能有。任何人都不会专门为你的数据库专门编写一个组件的。没有复用性的组件没有价值。你描述的是应用程序的需求不是组建的需求，自己把需求细化，根据每个需求找完组件再自己搭吧。
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Visual C++ MVP
