Function Invoke-Admin {
    param (
        [string]$program = $(throw "Please specify a program" ),
        [string]$argumentString = "",
        [switch]$waitForExit
    )

    $psi = new-object "Diagnostics.ProcessStartInfo"
    $psi.FileName = $program
    $psi.Arguments = $argumentString
    $psi.Verb = "runas"
    $psi.RedirectStandardOutput = $true
    $psi.UseShellExecute = $false
    $proc = [Diagnostics.Process]::Start($psi)
    $reader = $proc.StandardOutput
    $output = $reader.ReadToEnd()

    if ( $waitForExit ) {
        $proc.WaitForExit()
    }
    return $output
}