7.如何利用掩码位图制作透明图片？
................................\MainFrm.cpp
................................\MainFrm.h
................................\ReadMe.txt
................................\Release
................................\.......\Test.exe
................................\res
................................\Resource.h
................................\res\bitmap1.bmp
................................\...\bitmap2.bmp
................................\...\Test.ico
................................\...\Test.manifest
................................\...\Test.rc2
................................\...\TestDoc.ico
................................\...\Toolbar.bmp
................................\stdafx.cpp
................................\stdafx.h
................................\Test.aps
................................\Test.cpp
................................\Test.h
................................\Test.ncb
................................\Test.rc
................................\Test.sln
................................\Test.suo
................................\Test.vcproj
................................\TestDoc.cpp
................................\TestDoc.h
................................\TestView.cpp
................................\TestView.h