Script that launches a command in a new window. Prints exit code upon finish (-s to supress).

launch.ps1

param(
	[switch][Alias('s', 'silent')] $silentParameter,
	[switch][Alias('e', 'elevate')] $elevateParameter
)

$pshost = if ($PSVersionTable.PSVersion.Major -le 5) {'powershell'} else {'pwsh'}

$elevate = if ($elevateParameter) {'-Verb RunAs'} else {''}

$finish = if ($silentParameter) {''} else {'
	if ($lastexitcode -eq $null) {
		echo """`nProcess finished.""";
		read-host
	}
	else {
		echo """`nProcess finished with code $lastexitcode""";
		read-host
	}
'}

$expression = "start $pshost $elevate {-c 
	`$host.ui.RawUI.WindowTitle = '$args';
	$args;
	$finish
}"

invoke-expression $expression