vc++2010 wrote, GDI+, to achieve transparency of the picture, brightness, contrast settings can be saved as png file eventually.

ChangeAlpha\ChangeAlpha\2.jpg
...........\...........\ChangeAlpha.aps
...........\...........\ChangeAlpha.cpp
...........\...........\ChangeAlpha.h
...........\...........\ChangeAlpha.rc
...........\...........\ChangeAlpha.vcxproj
...........\...........\ChangeAlpha.vcxproj.baiduyun.uploading.cfg
...........\...........\ChangeAlpha.vcxproj.filters
...........\...........\ChangeAlpha.vcxproj.user
...........\...........\ChangeAlphaDlg.cpp
...........\...........\ChangeAlphaDlg.h
...........\...........\ReadMe.txt
...........\...........\res\ChangeAlpha.ico
...........\...........\...\ChangeAlpha.rc2
...........\...........\resource.h
...........\...........\stdafx.cpp
...........\...........\stdafx.h
...........\...........\targetver.h
...........\ChangeAlpha.sdf
...........\ChangeAlpha.sln
...........\ChangeAlpha.suo
...........\...........\Debug
...........\...........\res
...........\ChangeAlpha
...........\Debug
ChangeAlpha

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