演示了如何使位图(DIB)图象淡入淡出。本程序同时附加了一个利用全局内存来复制文件。由于图象的淡入淡出因其性能问题需要全局内存的使用，这附加的功能只是顺便加进而已。-Demonstrates how to make a bitmap (DIB) images fade. This program also added a global memory used to copy the files. As the image fades because of performance issues r