实例4  设置并叠加透明图片
.........................\TransparentPic
.........................\..............\MainFrm.cpp
.........................\..............\MainFrm.h
.........................\..............\ReadMe.txt
.........................\..............\res
.........................\..............\resource.h
.........................\..............\...\bitmap2.bmp
.........................\..............\...\bitmap3.bmp
.........................\..............\...\fem12L.bmp
.........................\..............\...\Toolbar.bmp
.........................\..............\...\TransparentPic.ico
.........................\..............\...\TransparentPic.rc2
.........................\..............\...\TransparentPicDoc.ico
.........................\..............\StdAfx.cpp
.........................\..............\StdAfx.h
.........................\..............\TransparentPic.aps
.........................\..............\TransparentPic.clw
.........................\..............\TransparentPic.cpp
.........................\..............\TransparentPic.dsp
.........................\..............\TransparentPic.dsw
.........................\..............\TransparentPic.h
.........................\..............\TransparentPic.opt
.........................\..............\TransparentPic.plg
.........................\..............\TransparentPic.rc
.........................\..............\TransparentPicDoc.cpp
.........................\..............\TransparentPicDoc.h
.........................\..............\TransparentPicView.cpp
.........................\..............\TransparentPicView.h