Description: Irregular form and button, good results, but with detailed notes, for beginners to learn.
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File list (Check if you may need any files):
abcd\abcd\App.ico
....\....\AssemblyInfo.cs
....\....\back.bmp
....\....\BitmapRegion.cs
....\....\BitmapRegionLibTest.suo
....\....\BitmapRegionTest.csproj
....\....\BitmapRegionTest.csproj.user
....\....\BitmapRegionTest.sln
....\....\BitmapRegionTest.suo
....\....\bob.bmp
....\....\bobsay.bmp
....\....\Form1.cs
....\....\Form1.resx
....\....\greenbtndown.bmp
....\....\greenbtnup.bmp
....\....\smiles.bmp
....\....\smilesangry.bmp
....\....\x.bmp
....\....\xsmile.bmp
....\abcd
abcd