Create a Windows application that uses multiple threads to scan a computer network segment, according to the computer s IP address for the Dns domain name If the computer is not online, the return message. Requirements of the initial interface is shown in Figure 1-1. When the user enters the IP address range, click】 【scan button, the program can automatically appear in the listBoxStatus IP address corresponding to each Dns Information. Specific requirements are as follows: (1) of the user to select IP address range to verify if the IP address is legitimate, given the appropriate message. (2) perform a scan operation, to create a thread to scan an IP address. (3) corresponding to each IP address information is added to the listBoxStatus in Dns. Such as using "IP address--- Dns domain name " form.

ScanComputer\ScanComputer\bin\Debug\ScanComputer.exe
............\............\...\.....\ScanComputer.pdb
............\............\...\.....\ScanComputer.vshost.exe
............\............\...\.....\ScanComputer.vshost.exe.manifest
............\............\...\Release\ScanComputer.exe
............\............\...\.......\ScanComputer.pdb
............\............\Form1.cs
............\............\Form1.Designer.cs
............\............\Form1.resx
............\............\obj\Debug\ScanComputer.csproj.FileListAbsolute.txt
............\............\...\.....\ScanComputer.csproj.GenerateResource.Cache
............\............\...\.....\ScanComputer.exe
............\............\...\.....\ScanComputer.Form1.resources
............\............\...\.....\ScanComputer.pdb
............\............\...\.....\ScanComputer.Properties.Resources.resources
............\............\...\Release\ScanComputer.csproj.FileListAbsolute.txt
............\............\...\.......\ScanComputer.csproj.GenerateResource.Cache
............\............\...\.......\ScanComputer.exe
............\............\...\.......\ScanComputer.Form1.resources
............\............\...\.......\ScanComputer.pdb
............\............\...\.......\ScanComputer.Properties.Resources.resources
............\............\Program.cs
............\............\...perties\AssemblyInfo.cs
............\............\..........\Resources.Designer.cs
............\............\..........\Resources.resx
............\............\..........\Settings.Designer.cs
............\............\..........\Settings.settings
............\............\Scan.cs
............\............\ScanComputer.csproj
............\ScanComputer.sln
............\ScanComputer.suo
............\............\obj\Debug\TempPE
............\............\...\Release\TempPE
............\............\bin\Debug
............\............\...\Release
............\............\obj\Debug
............\............\...\Release
............\............\bin
............\............\obj
............\............\Properties
............\ScanComputer
ScanComputer

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