(1) design digital button events, button events because of the digital functions are the corresponding figures in the text box, so that the full number of buttons can share event handling methods (2) operator button events are basically the same, so all operator buttons can also share the same event handling method. Method reads the text box value and the mortgage operator, and can identify the need for intelligent computing (3) keyboard events can be only one event handler method, according to the different keys before the mouse event or call custom method to simulate mouse events before the definition.

WindowsCaculation\WindowsCaculation\bin\Debug\WindowsApplication1.exe
.................\.................\...\.....\WindowsApplication1.pdb
.................\.................\...\.....\WindowsApplication1.vshost.exe
.................\.................\...\.....\WindowsApplication1.vshost.exe.manifest
.................\.................\...\.....\WindowsCaculation.exe
.................\.................\...\.....\WindowsCaculation.pdb
.................\.................\...\.....\WindowsCaculation.vshost.exe
.................\.................\...\.....\WindowsCaculation.vshost.exe.manifest
.................\.................\Form1.cs
.................\.................\Form1.Designer.cs
.................\.................\Form1.resx
.................\.................\obj\Debug\TempPE\Properties.Resources.Designer.cs.dll
.................\.................\...\.....\WindowsApplication1.exe
.................\.................\...\.....\WindowsApplication1.pdb
.................\.................\...\.....\WindowsApplication1.Properties.Resources.resources
.................\.................\...\.....\WindowsCaculation.csproj.FileListAbsolute.txt
.................\.................\...\.....\WindowsCaculation.csproj.GenerateResource.Cache
.................\.................\...\.....\WindowsCaculation.exe
.................\.................\...\.....\WindowsCaculation.Form1.resources
.................\.................\...\.....\WindowsCaculation.pdb
.................\.................\...\.....\WindowsCaculation.Properties.Resources.resources
.................\.................\...\WindowsCaculation.csproj.FileList.txt
.................\.................\Program.cs
.................\.................\...perties\AssemblyInfo.cs
.................\.................\..........\Resources.Designer.cs
.................\.................\..........\Resources.resx
.................\.................\..........\Settings.Designer.cs
.................\.................\..........\Settings.settings
.................\.................\Resources\20100401006.jpg
.................\.................\UpgradeLog.XML
.................\.................\WindowsCaculation.csproj
.................\.................\WindowsCaculation.csproj.user
.................\.................\WindowsCaculation.sln
.................\.................\WindowsCaculation.suo
.................\.................\_UpgradeReport_Files\UpgradeReport.css
.................\.................\....................\UpgradeReport.xslt
.................\.................\....................\UpgradeReport_Minus.gif
.................\.................\....................\UpgradeReport_Plus.gif
.................\WindowsCaculation.sln
.................\WindowsCaculation.suo
.................\.................\obj\Debug\Refactor
.................\.................\...\.....\TempPE
.................\.................\bin\Debug
.................\.................\obj\Debug
.................\.................\bin
.................\.................\obj
.................\.................\Properties
.................\.................\Resources
.................\.................\_UpgradeReport_Files
.................\WindowsCaculation
WindowsCaculation

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