VC tooltip可以显示多行文字的窗口提示条，类似于气泡提示的功能，但从外观上来说，和气泡提示差别较大，VC++编程学习源码，很好的参考资料。-VC tooltip can display multiple lines of text in the window tooltip, bubble prompted similar features, but the appearance, and the bubble tips vary greatly, VC++ programming le