C# prepared a drawing board, you can draw a rectangle, oval and straight line, and you can select the graphics, such as drag and enlarge small ones! ! A very good example, can refer to.

DrawTool\WindowsApplication1\Anteprima.cs
........\...................\Anteprima.Designer.cs
........\...................\Anteprima.resx
........\...................\bin\Debug\AxInterop.SHDocVw.dll
........\...................\...\.....\Interop.SHDocVw.dll
........\...................\...\.....\WindowsApplication1.exe
........\...................\...\.....\WindowsApplication1.pdb
........\...................\...\.....\WindowsApplication1.vshost.exe
........\...................\...\Release\AxInterop.SHDocVw.dll
........\...................\...\.......\Interop.SHDocVw.dll
........\...................\...\.......\RichTextBoxPrintCtrl.dll
........\...................\...\.......\RichTextBoxPrintCtrl.pdb
........\...................\...\.......\UserControl1.cs
........\...................\...\.......\UserControl1.Designer.cs
........\...................\...\.......\UserControl1.resx
........\...................\...\.......\WindowsApplication1.exe
........\...................\...\.......\WindowsApplication1.pdb
........\...................\CommandForm.cs
........\...................\CommandForm.Designer.cs
........\...................\CommandForm.resx
........\...................\Form1.cs
........\...................\Form1.Designer.cs
........\...................\Form1.resx
........\...................\Handle.cs
........\...................\Help.cs
........\...................\Help.Designer.cs
........\...................\Help.resx
........\...................\obj\Debug\AxInterop.SHDocVw.dll
........\...................\...\.....\Interop.SHDocVw.dll
........\...................\...\.....\TempPE\Properties.Resources.Designer.cs.dll
........\...................\...\.....\WindowsApplication1.Anteprima.resources
........\...................\...\.....\WindowsApplication1.csproj.GenerateResource.Cache
........\...................\...\.....\WindowsApplication1.csproj.ResolveComReference.cache
........\...................\...\.....\WindowsApplication1.exe
........\...................\...\.....\WindowsApplication1.Form1.resources
........\...................\...\.....\WindowsApplication1.Help.resources
........\...................\...\.....\WindowsApplication1.pdb
........\...................\...\.....\WindowsApplication1.Properties.Resources.resources
........\...................\...\.....\WindowsApplication1.richForm2.resources
........\...................\...\.....\WindowsApplication1.toolBox.resources
........\...................\...\.....\WindowsApplication1.vectShapes.resources
........\...................\...\WindowsApplication1.csproj.FileList.txt
........\...................\...\WindowsApplication1.csproj.FileListAbsolute.txt
........\...................\Program.cs
........\...................\...perties\AssemblyInfo.cs
........\...................\..........\Resources.Designer.cs
........\...................\..........\Resources.resx
........\...................\..........\Settings.Designer.cs
........\...................\..........\Settings.settings
........\...................\richForm2.cs
........\...................\richForm2.Designer.cs
........\...................\richForm2.resx
........\...................\RichTextBoxPrintCtrl.cs
........\...................\Settings.cs
........\...................\Shapes.cs
........\...................\toolBox.cs
........\...................\toolBox.Designer.cs
........\...................\toolBox.resx
........\...................\UserControl1.cs
........\...................\UserControl1.Designer.cs
........\...................\UserControl1.resx
........\...................\vectShapes.cs
........\...................\vectShapes.Designer.cs
........\...................\vectShapes.resx
........\...................\WindowsApplication1.csproj
........\...................\WindowsApplication1.csproj.user
........\WindowsApplication1.sln
........\WindowsApplication1.suo
........\...................\obj\Debug\TempPE
........\...................\bin\Debug
........\...................\...\Release
........\...................\obj\Debug
........\...................\bin
........\...............

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