rips icons from executibles... has optional GUI filepicker

Export-Icon.ps1

<# Export-Icon
    Extracts the icon from an executible (.EXE) file.

    By default, this will extract the icon to the same folder and name as
    the BaseName of the executible, with a ".ICO" extension.

    Usage:
        -SourceEXE
            Mandatory.  This must be a valid UNC. (you can pass any file, but
            it will most likely only work with .EXE files)
        -DestinationFolder
            Optional.  This will default to the same directory as the EXE file
            if not provided, the path cannot be found, or the path is not a folder.
        -GUI
            Flag lets you use a GUI file picker.
#>
If (-Not (Test-Path function:global:Export-Icon)) {
.'\\DC\ps1\functions\Get-FileNameGUI.ps1'

Function Global:Export-Icon {
    Param (
    [string]$SourceEXE,
    [string]$DestinationFolder,
    [switch]$GUI
    )

    [System.Reflection.Assembly]::LoadWithPartialName('System.Drawing')  | Out-Null

    If ($GUI){$SourceEXE = Get-FileNameGUI '\\Domain\Apps' 'EXE (*.exe)|*.exe|Everything (*.*)|*.*'}

    $sourceExists = Test-Path $SourceEXE -ErrorAction SilentlyContinue
    $destinationExists = Test-Path $DestinationFolder -ErrorAction SilentlyContinue
    $destinationIsDir = (Get-Item $DestinationFolder -ErrorAction SilentlyContinue).PSIsContainer

    If($sourceExists){
        $sourceItem = Get-Item $SourceEXE

        If(-not $destinationExists -or -not $destinationIsDir){$DestinationFolder = $sourceItem.DirectoryName}
        $exportFileName = ($DestinationFolder + '\' + $sourceItem.BaseName + '.ico')

        $EXEIsOnNetwork = -not (Resolve-Path $SourceEXE).Drive
        If($EXEIsOnNetwork){
            $localTempEXEPath = ($env:TEMP + '\' + $sourceItem.Name)
            Copy-Item $SourceEXE $localTempEXEPath -Force
            $sourceEXE = $localTempEXEPath
            $needToCleanUp = $true
        }

        [System.Drawing.Icon]::ExtractAssociatedIcon($SourceEXE).ToBitmap().Save($exportFileName)
    }
    Else{
        Write-Error "Invalid source executible." -errorID NoSource -TargetObject Export-Icon
    }

    If($needToCleanUp){Remove-Item $localTempEXEPath -Force}
}
}