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.NET Console Password Input By Masking Keyed-In Characters

, 27 Aug 2004
Demonstrates how to intercept .NET console keyboard input and display a * in place of each actual typed-in character.
consolepasswordinput_src.zip
ConsolePasswordInput
App.ico
bin
ConsolePasswordInput.csproj.user
obj
Debug
ConsolePasswordInput.exe
Debug
temp
TempPE
<VisualStudioProject>
    <CSHARP
        ProjectType = "Local"
        ProductVersion = "7.10.3077"
        SchemaVersion = "2.0"
        ProjectGuid = "{8587BDF6-E302-4A32-8343-3426B80FB1C2}"
    >
        <Build>
            <Settings
                ApplicationIcon = "App.ico"
                AssemblyKeyContainerName = ""
                AssemblyName = "ConsolePasswordInput"
                AssemblyOriginatorKeyFile = ""
                DefaultClientScript = "JScript"
                DefaultHTMLPageLayout = "Grid"
                DefaultTargetSchema = "IE50"
                DelaySign = "false"
                OutputType = "Exe"
                PreBuildEvent = ""
                PostBuildEvent = ""
                RootNamespace = "ConsolePasswordInput"
                RunPostBuildEvent = "OnBuildSuccess"
                StartupObject = ""
            >
                <Config
                    Name = "Debug"
                    AllowUnsafeBlocks = "false"
                    BaseAddress = "285212672"
                    CheckForOverflowUnderflow = "false"
                    ConfigurationOverrideFile = ""
                    DefineConstants = "DEBUG;TRACE"
                    DocumentationFile = ""
                    DebugSymbols = "true"
                    FileAlignment = "4096"
                    IncrementalBuild = "false"
                    NoStdLib = "false"
                    NoWarn = ""
                    Optimize = "false"
                    OutputPath = "bin\Debug\"
                    RegisterForComInterop = "false"
                    RemoveIntegerChecks = "false"
                    TreatWarningsAsErrors = "false"
                    WarningLevel = "4"
                />
                <Config
                    Name = "Release"
                    AllowUnsafeBlocks = "false"
                    BaseAddress = "285212672"
                    CheckForOverflowUnderflow = "false"
                    ConfigurationOverrideFile = ""
                    DefineConstants = "TRACE"
                    DocumentationFile = ""
                    DebugSymbols = "false"
                    FileAlignment = "4096"
                    IncrementalBuild = "false"
                    NoStdLib = "false"
                    NoWarn = ""
                    Optimize = "true"
                    OutputPath = "bin\Release\"
                    RegisterForComInterop = "false"
                    RemoveIntegerChecks = "false"
                    TreatWarningsAsErrors = "false"
                    WarningLevel = "4"
                />
            </Settings>
            <References>
                <Reference
                    Name = "System"
                    AssemblyName = "System"
                    HintPath = "..\..\..\..\..\..\..\..\WINDOWS\Microsoft.NET\Framework\v1.1.4322\System.dll"
                />
                <Reference
                    Name = "System.Data"
                    AssemblyName = "System.Data"
                    HintPath = "..\..\..\..\..\..\..\..\WINDOWS\Microsoft.NET\Framework\v1.1.4322\System.Data.dll"
                />
                <Reference
                    Name = "System.XML"
                    AssemblyName = "System.Xml"
                    HintPath = "..\..\..\..\..\..\..\..\WINDOWS\Microsoft.NET\Framework\v1.1.4322\System.XML.dll"
                />
            </References>
        </Build>
        <Files>
            <Include>
                <File
                    RelPath = "App.ico"
                    BuildAction = "Content"
                />
                <File
                    RelPath = "AssemblyInfo.cs"
                    SubType = "Code"
                    BuildAction = "Compile"
                />
                <File
                    RelPath = "ConsolePasswordInput.cs"
                    SubType = "Code"
                    BuildAction = "Compile"
                />
            </Include>
        </Files>
    </CSHARP>
</VisualStudioProject>

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Lim Bio Liong
Web Developer
Singapore Singapore
Lim Bio Liong is a Specialist at a leading Software House in Singapore.
 
Bio has been in software development for over 10 years. He specialises in C/C++ programming and Windows software development.
 
Bio has also done device-driver development and enjoys low-level programming. Bio has recently picked up C# programming and has been researching in this area.

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