在按纽上播放avi文件. 本程序介绍一个从CButton派生的类CAniButton，用于播放AVI动画， 象一般的CButton按钮一样使用CAniButton（Style必须包含自绘制风格）， 在OnInitDialog对话框中调用LoadAVI(AVI_ID), 其中，AVI_ID是在资源文件中的动画文件的标识。 按钮将改变大小，以匹配AVI动画。其中，第一帧将用作静态外观。-button the player avi file. The procedures introduced a CButton derived from the class CAniButton, AVI animation for the broadcast, as a general CButton CAniButton use the same button (since Style must include drawing style), in OnInitDialog dialog box called LoadAVI (AVI_ID), which, AVI_ID resources in the paper's logo animation files. The button will change the size to match AVI animation. Among them, the first frame will be used as a static appearance.