Powershell script to extract HQ icons

Extract-Icons.ps1

<# Extract-Icons
    Requires iconsext.exe from:
        http://www.nirsoft.net/utils/iconsext.html

    No documentation because I'm lazy.

    I needed something to extract high resolution icons and couldn't find a definite
        answer so i just reused a CMD compatible free program.
#>

$env:uncExtractorEXE = ''
If (-not $env:uncExtractorEXE){$env:uncExtractorEXE = Join-Path $PSScriptRoot 'iconsext.exe'}

function global:Extract-Icons{
    param(
        [System.IO.FileInfo]$TargetFile,
        [System.IO.DirectoryInfo]$OutputFolder,
        [System.IO.FileInfo]$EXELocation = $env:uncExtractorEXE
    )
    # Verify files exist
    $existsEXELocation = Test-Path $EXELocation
    $existsTargetFile = Test-Path $TargetFile
    $existsOutputFolder = Test-Path $OutputFolder
    If ($existsOutputFolder){
        # Make sure this is a directory
        $existsOutputFolder = $OutputFolder.Attributes -like '*Directory*'
    }
    
    If ($existsTargetFile -and $existsOutputFolder -and $existsEXELocation){
        # iconsext.exe /save "source file" "save folder" [-icons] [-cursors] [-asico] 
        $argsExtractor = (
            '/save' + ' ' +
            '"' + $TargetFile + '"' + ' ' +
            '"' + $OutputFolder + '"' + ' ' +
            '-Icons'
        )
        # Extract the icons!
        $null = Start-Process -FilePath $env:uncExtractorEXE -ArgumentList $argsExtractor -Wait
    }
    Else{
        # Throw out an error for what went wrong.
        If (-not $existsTargetFile){Throw ('Target file "' + $TargetFile.FullName + '" does not exist.')}
        ElseIf (-not $existsOutputFolder){Throw ('Output folder "' + $OutputFolder.FullName + '" does not exist.')}
        ElseIf (-not $existsEXELocation){Throw ('Executible file "' + $EXELocation.FullName + '" does not exist.')}
        Else{Throw 'Nondescript error.'}
    }
}

and this produces non GDI+ friendly images. =,(