Description: Very suitable interfaces friend, can serve as a useful example to use. Which is a computer keyboard control
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File list (Check if you may need any files):
TouchKey\Backup\TouchKey\Form1.cs
........\......\........\Form1.Designer.cs
........\......\........\Form1.resx
........\......\........\Program.cs
........\......\........\...perties\AssemblyInfo.cs
........\......\........\..........\Resources.Designer.cs
........\......\........\..........\Resources.resx
........\......\........\..........\Settings.Designer.cs
........\......\........\..........\Settings.settings
........\......\........\Resources\1.jpg
........\......\........\.........\2.jpg
........\......\........\TouchKey.csproj
........\......\TouchKey.sln
........\......\TouchKey.v12.suo
........\TouchKey\bin\Debug\TouchKey.exe
........\........\...\.....\TouchKey.pdb
........\........\...\.....\TouchKey.vshost.exe
........\........\...\.....\TouchKey.vshost.exe.manifest
........\........\Form1.cs
........\........\Form1.Designer.cs
........\........\Form1.resx
........\........\obj\Debug\DesignTimeResolveAssemblyReferences.cache
........\........\...\.....\DesignTimeResolveAssemblyReferencesInput.cache
........\........\...\.....\TempPE\Properties.Resources.Designer.cs.dll
........\........\...\.....\TouchKey.csproj.FileListAbsolute.txt
........\........\...\.....\TouchKey.csproj.GenerateResource.Cache
........\........\...\.....\TouchKey.csprojResolveAssemblyReference.cache
........\........\...\.....\TouchKey.exe
........\........\...\.....\TouchKey.Form1.resources
........\........\...\.....\TouchKey.pdb
........\........\...\.....\TouchKey.Properties.Resources.resources
........\........\Program.cs
........\........\...perties\AssemblyInfo.cs
........\........\..........\Resources.Designer.cs
........\........\..........\Resources.resx
........\........\..........\Settings.Designer.cs
........\........\..........\Settings.settings
........\........\Resources\1.jpg
........\........\.........\2.jpg
........\........\TouchKey.csproj
........\TouchKey.sln
........\TouchKey.suo
........\TouchKey.v12.suo
........\UpgradeLog.htm
........\TouchKey\obj\Debug\TempPE
........\Backup\TouchKey\Properties
........\......\........\Resources
........\TouchKey\bin\Debug
........\........\obj\Debug
........\Backup\TouchKey
........\TouchKey\bin
........\........\obj
........\........\Properties
........\........\Resources
........\Backup
........\TouchKey
TouchKey