PowerShell function to test whether the current script is running as an elevated admin

Is-Elevated.ps1

function Is-Elevated
{
    $wid = [System.Security.Principal.WindowsIdentity]::GetCurrent()
    $prp = New-Object System.Security.Principal.WindowsPrincipal($wid)
    $adm = [System.Security.Principal.WindowsBuiltInRole]::Administrator
    $IsAdmin = $prp.IsInRole($adm)
    return $IsAdmin
}