实现画图的基本工具，
可以拖动句柄，实现修改，
实现图层的叠加，
资源文件列表
Project/DocToolkit/AssemblyInfo.cs , 2858
Project/DocToolkit/DocManager.cs , 28229
Project/DocToolkit/DocToolkit.csproj , 4954
Project/DocToolkit/DocToolkit.csproj.user , 1804
Project/DocToolkit/DocToolkit.sln , 905
Project/DocToolkit/DocToolkit.snk , 596
Project/DocToolkit/DragDropManager.cs , 4039
Project/DocToolkit/MruManager.cs , 16161
Project/DocToolkit/PersistWindowState.cs , 6483
Project/DrawTools/about.bmp , 382
Project/DrawTools/App.ico , 1078
Project/DrawTools/AssemblyInfo.cs , 2838
Project/DrawTools/DrawArea.cs , 10898
Project/DrawTools/DrawArea.resx , 6435
Project/DrawTools/DrawEllipse.cs , 734
Project/DrawTools/DrawLine.cs , 6991
Project/DrawTools/DrawObject.cs , 7974
Project/DrawTools/DrawPolygon.cs , 6160
Project/DrawTools/DrawRectangle.cs , 9938
Project/DrawTools/DrawTools.csproj , 10406
Project/DrawTools/DrawTools.csproj.user , 1803
Project/DrawTools/DrawTools.sln , 903
Project/DrawTools/ellipse.bmp , 382
Project/DrawTools/Ellipse.cur , 326
Project/DrawTools/Form1.cs , 45769
Project/DrawTools/Form1.resx , 30980
Project/DrawTools/FormAbout.cs , 3758
Project/DrawTools/FormAbout.resx , 9399
Project/DrawTools/GraphicsList.cs , 11166
Project/DrawTools/GraphicsProperties.cs , 1477
Project/DrawTools/line.bmp , 382
Project/DrawTools/Line.cur , 326
Project/DrawTools/new.bmp , 382
Project/DrawTools/open.bmp , 382
Project/DrawTools/pencil.bmp , 382
Project/DrawTools/Pencil.cur , 326
Project/DrawTools/pointer.bmp , 382
Project/DrawTools/PolyHandle.cur , 518
Project/DrawTools/PropertiesDialog.cs , 10065
Project/DrawTools/PropertiesDialog.resx , 10965
Project/DrawTools/rectangle.bmp , 382
Project/DrawTools/Rectangle.cur , 326
Project/DrawTools/save.bmp , 382
Project/DrawTools/Tool.cs , 1076
Project/DrawTools/ToolEllipse.cs , 455
Project/DrawTools/ToolLine.cs , 870
Project/DrawTools/ToolObject.cs , 1711
Project/DrawTools/ToolPointer.cs , 7223
Project/DrawTools/ToolPolygon.cs , 2288
Project/DrawTools/ToolRectangle.cs , 866
Project/DrawTools.sln , 1508