如何让工具提示更加吸引用户？增加声音效果也许更有效。本程序就是介绍如何从CToolTipCtrl派生出一个CWavTipCtrl来实现播放声音功能。-tools suggest how to attract more customers? Increase sound effects may be more effective. This procedure is how derived from CToolTipCtrl CWavTipCtrl to achieve a voice broad