Public/Get-RegMultiString.ps1

function Get-RegMultiString
{

    <#
    .SYNOPSIS
           Retrieves an array of null-terminated strings (REG_MULTI_SZ) from local or remote computers.
 
    .DESCRIPTION
           Use Get-RegMultiString to retrieve an array of null-terminated strings (REG_MULTI_SZ) from local or remote computers.
            
    .PARAMETER ComputerName
            An array of computer names. The default is the local computer.
 
    .PARAMETER Hive
           The HKEY to open, from the RegistryHive enumeration. The default is 'LocalMachine'.
           Possible values:
            
        - ClassesRoot
        - CurrentUser
        - LocalMachine
        - Users
        - PerformanceData
        - CurrentConfig
        - DynData
 
    .PARAMETER Key
           The path of the registry key to open.
 
    .PARAMETER Value
           The name of the registry value.
 
    .PARAMETER Ping
           Use ping to test if the machine is available before connecting to it.
           If the machine is not responding to the test a warning message is output.
 
 
    .EXAMPLE
        $Key = "SYSTEM\CurrentControlSet\services\LanmanServer\Shares"
        Get-RegMultiString -Key $Key -Value Drivers
 
        ComputerName Hive Key Value Data
        ------------ ---- --- ----- ----
        COMPUTER1 LocalMachine SYSTEM\CurrentControlSet\services\LanmanServer\Shares Drivers {CSCFlags=0, MaxUses=429496729...
 
 
        Description
        -----------
        The command gets the flags of the Drivers system shared folder from the local computer.
        The name of ComputerName parameter, which is optional, is omitted.
         
    .EXAMPLE
        "DC1","DC2" | Get-RegString -Key $Key -Value Sysvol -Ping
         
        ComputerName Hive Key Value Data
        ------------ ---- --- ----- ----
        DC1 LocalMachine SYSTEM\CurrentControlSet\services\LanmanServer\Shares Sysvol {CSCFlags=256, MaxUses=429496...
        DC2 LocalMachine SYSTEM\CurrentControlSet\services\LanmanServer\Shares Sysvol {CSCFlags=256, MaxUses=429496...
 
        Description
        -----------
        The command gets the flags of the Sysvol system shared folder from two DC computers.
        When the Switch parameter Ping is specified the command issues a ping test to each computer.
        If the computer is not responding to the ping request a warning message is written to the console and the computer is not processed.
 
    .EXAMPLE
        Get-Content servers.txt | Get-RegString -Key $Key -Value Sysvol
         
        ComputerName Hive Key Value Data
        ------------ ---- --- ----- ----
        DC1 LocalMachine SYSTEM\CurrentControlSet\services\LanmanServer\Shares Sysvol {CSCFlags=256, MaxUses=429496...
        DC2 LocalMachine SYSTEM\CurrentControlSet\services\LanmanServer\Shares Sysvol {CSCFlags=256, MaxUses=429496...
 
        Description
        -----------
        The command uses the Get-Content cmdlet to get the DC names from a text file.
 
    .OUTPUTS
        PSFanatic.Registry.RegistryValue (PSCustomObject)
 
    .LINK
        Set-RegMultiString
        Get-RegValue
        Remove-RegValue
        Test-RegValue
    #>

    

    [OutputType('PSFanatic.Registry.RegistryValue')]
    [CmdletBinding(DefaultParameterSetName="__AllParameterSets")]
    
    param( 
        [Parameter(
            Position=0,
            ValueFromPipeline=$true,
            ValueFromPipelineByPropertyName=$true,
            HelpMessage="An array of computer names. The default is the local computer."
        )]        
        [Alias("CN","__SERVER","IPAddress")]
        [string[]]$ComputerName="",        
        
        [Parameter(
            Position=1,
            ValueFromPipelineByPropertyName=$true,
            HelpMessage="The HKEY to open, from the RegistryHive enumeration. The default is 'LocalMachine'."
        )]
        [ValidateSet("ClassesRoot","CurrentUser","LocalMachine","Users","PerformanceData","CurrentConfig","DynData")]
        [string]$Hive="LocalMachine",

        [Parameter(
            Mandatory=$true,
            Position=2,
            ValueFromPipelineByPropertyName=$true,
            HelpMessage="The path of the subkey to open."
        )]
        [string]$Key,

        [Parameter(
            Mandatory=$true,
            Position=3,
            ValueFromPipelineByPropertyName=$true,
            HelpMessage="The name of the value to get."
        )]
        [string]$Value,
        
        [switch]$Ping
    ) 
    

    process
    {
     
            Write-Verbose "Enter process block..."
        
        foreach($c in $ComputerName)
        {    
            try
            {                
                if($c -eq "")
                {
                    $c=$env:COMPUTERNAME
                    Write-Verbose "Parameter [ComputerName] is not presnet, setting its value to local computer name: [$c]."
                    
                }
                
                if($Ping)
                {
                    Write-Verbose "Parameter [Ping] is presnet, initiating Ping test"
                    
                    if( !(Test-Connection -ComputerName $c -Count 1 -Quiet))
                    {
                        Write-Warning "[$c] doesn't respond to ping."
                        return
                    }
                }

                
                Write-Verbose "Starting remote registry connection against: [$c]."
                Write-Verbose "Registry Hive is: [$Hive]."
                $reg = [Microsoft.Win32.RegistryKey]::OpenRemoteBaseKey([Microsoft.Win32.RegistryHive]$Hive,$c)    
        
                Write-Verbose "Open remote subkey: [$Key]"
                $subKey = $reg.OpenSubKey($Key)    
                
                if(!$subKey)
                {
                    Throw "Key '$Key' doesn't exist."
                }                
                
                Write-Verbose "Get value name : [$Value]"
                $rv = $subKey.GetValue($Value,-1)
                
                if($rv -eq -1)
                {
                    Write-Error "Cannot find value [$Value] because it does not exist."
                }
                else
                {
                    Write-Verbose "Create PSFanatic registry value custom object."
                    $pso = New-Object PSObject -Property @{
                        ComputerName=$c
                        Hive=$Hive
                        Value=$Value
                        Key=$Key
                        Data=$rv
                        Type=$subKey.GetValueKind($Value)
                    }

                    Write-Verbose "Adding format type name to custom object."
                    $pso.PSTypeNames.Clear()
                    $pso.PSTypeNames.Add('PSFanatic.Registry.RegistryValue')
                    $pso
                }
                
                Write-Verbose "Closing remote registry connection on: [$c]."
                $subKey.close()
            }
            catch
            {
                Write-Error $_
            }
        } 
        
        Write-Verbose "Exit process block..."
    }
}