C#圆角按钮

一个圆角按钮的实现，很好的示例代码，看完可以加深理解

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2006-09-27 13:11  RoundButtonHost\RoundButton\
     目录           0  2006-09-12 16:26  RoundButtonHost\RoundButton\bin\
     目录           0  2006-09-27 15:38  RoundButtonHost\RoundButton\bin\Debug\
     目录           0  2006-09-27 10:27  RoundButtonHost\RoundButton\bin\Release\
     文件       57344  2006-09-27 15:22  RoundButtonHost\RoundButton\bin\Release\RoundButton.dll
     目录           0  2006-09-25 15:45  RoundButtonHost\RoundButton\Images\
     文件         246  2004-11-18 09:45  RoundButtonHost\RoundButton\Images\RoundButton.bmp
     文件        4734  2006-09-22 13:26  RoundButtonHost\RoundButton\Images\RoundButtonRecess0.bmp
     文件        4734  2006-09-22 13:26  RoundButtonHost\RoundButton\Images\RoundButtonRecess2.bmp
     文件        5014  2006-09-22 13:26  RoundButtonHost\RoundButton\Images\RoundButtonRecess3.bmp
     文件        5014  2006-09-22 13:26  RoundButtonHost\RoundButton\Images\RoundButtonRecess4.bmp
     文件        4854  2006-09-22 13:26  RoundButtonHost\RoundButton\Images\RoundButtonRecess5.bmp
     目录           0  2006-09-12 16:26  RoundButtonHost\RoundButton\obj\
     目录           0  2006-09-27 15:39  RoundButtonHost\RoundButton\obj\Debug\
     目录           0  2006-09-22 14:31  RoundButtonHost\RoundButton\obj\Debug\Refactor\
     文件         246  2004-11-18 09:45  RoundButtonHost\RoundButton\obj\Debug\RoundButton.Images.RoundButton.bmp
     目录           0  2006-09-26 13:52  RoundButtonHost\RoundButton\obj\Debug\TempPE\
     目录           0  2006-09-27 15:22  RoundButtonHost\RoundButton\obj\Release\
     目录           0  2006-09-25 13:58  RoundButtonHost\RoundButton\obj\Release\Refactor\
     文件         246  2004-11-18 09:45  RoundButtonHost\RoundButton\obj\Release\RoundButton.Images.RoundButton.bmp
     目录           0  2006-09-25 16:00  RoundButtonHost\RoundButton\obj\Release\TempPE\
     目录           0  2006-09-26 13:08  RoundButtonHost\RoundButton\Properties\
     文件        1415  2006-09-26 13:08  RoundButtonHost\RoundButton\Properties\AssemblyInfo.cs
     文件        2847  2006-09-25 16:00  RoundButtonHost\RoundButton\Properties\Resources.Designer.cs
     文件        5817  2006-09-25 16:00  RoundButtonHost\RoundButton\Properties\Resources.resx
     文件        4312  2006-09-26 14:57  RoundButtonHost\RoundButton\RecessEditorControl.cs
     文件        6263  2006-09-22 15:08  RoundButtonHost\RoundButton\RecessEditorControl.Designer.cs
     文件       43369  2006-09-22 15:08  RoundButtonHost\RoundButton\RecessEditorControl.resx
     文件       21712  2006-09-27 13:11  RoundButtonHost\RoundButton\RoundButton.cs
     文件        3402  2006-09-25 16:02  RoundButtonHost\RoundButton\RoundButton.csproj
     文件        4741  2006-09-12 16:26  RoundButtonHost\RoundButton\VerticalString.cs
............此处省略28个文件信息