Public/Test-RegistryValue.ps1

function Test-RegistryValue
{
    <#
        .Synopsis
            Function to Test Registry Values
        .DESCRIPTION
            Function to Test Registry Values
        .PARAMETER Path
            Registry path to be tested
        .PARAMETER Value
            Registry value to be tested
        .EXAMPLE
            Test-RegistryValue -Path "HKLM:SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" -Value "AutoAdminLogon"
        .EXAMPLE
            Test-RegistryValue "HKLM:SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" "AutoAdminLogon"
        .NOTES
            Version: 1.0
            DateModified: 16/Ene/2018
            LasModifiedBy: Vicente Rodriguez Eguibar
                vicente@eguibar.com
                Eguibar Information Technology S.L.
                http://www.eguibarit.com
  #>

    [CmdletBinding(ConfirmImpact = 'Low')]
    [OutputType([Bool])]
    Param (
        [parameter(Mandatory=$true, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, ValueFromRemainingArguments = $false,
            HelpMessage = 'Registry path to be tested',
        Position = 0)]
        [ValidateNotNullOrEmpty()]
        [string]
        $Path,

        [parameter(Mandatory=$true, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, ValueFromRemainingArguments = $false,
            HelpMessage = 'Registry value to be tested',
        Position = 1)]
        [ValidateNotNullOrEmpty()]
        [string]
        $Value
    )
    Begin {
        Write-Verbose -Message '|=> ************************************************************************ <=|'
        Write-Verbose -Message (Get-Date).ToShortDateString()
        Write-Verbose -Message (' Starting: {0}' -f $MyInvocation.Mycommand)

        #display PSBoundparameters formatted nicely for Verbose output
        $NL   = "`n"  # New Line
        $HTab = "`t"  # Horizontal Tab
        [string]$pb = ($PSBoundParameters | Format-Table -AutoSize | Out-String).TrimEnd()
        Write-Verbose -Message "Parameters used by the function... $NL$($pb.split($NL).Foreach({"$($HTab*4)$_"}) | Out-String) $NL"
    }
    Process {
        try {
            Get-ItemProperty -Path $Path | Select-Object -ExpandProperty $Value -ErrorAction Stop | Out-Null
            return $true
        }
        catch {
            return $false
        }
    }

    End {
        Write-Verbose -Message "Function $($MyInvocation.InvocationName) finished testing registry."
        Write-Verbose -Message ''
        Write-Verbose -Message '-------------------------------------------------------------------------------'
        Write-Verbose -Message ''
    }
}