List the controls added to a SPDelegate on a Website

I need to inspect a delegate control, to discover which control there is add to it. So I create this PowerShell code to create a HttpContext, set the right Current.Items to be a real SharePoint context. Create a SharePoint Delegate Control, set the properties and then invoke CreateChildControls on it and out put the result on the screen.

[System.Reflection.Assembly]::LoadWithPartialName("System.Web") | Out-Null
[System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint") | Out-Null
 
#parm
$delegateControlId = "SmallSearchInputBox"
$weburl = "/cwd"
$hosturl = "http://win-ugka6ujlm21"
$absoluteUrl = $hosturl+$weburl
 
#creating a fake httpcontext
$request = New-Object "System.Web.HttpRequest" "", $absoluteUrl, ""
$stringWriter = New-Object "System.IO.StringWriter"
$httpResponse = New-Object "System.Web.HttpResponse" $stringWriter
[System.Web.HttpContext]::Current = New-Object "System.Web.HttpContext" $request, $httpResponse
 
#HACK - Need a 'Microsoft.SharePoint.SPWeb' not a 'System.Management.Automation.PSObject'
[System.Web.HttpContext]::Current.Items["HttpHandlerSPWeb"] = (Get-SPSite -Identity $hosturl).OpenWeb($weburl, $false) 
 
#create and set properties for the delegate control
$dc = New-Object "Microsoft.SharePoint.WebControls.DelegateControl"
$dc.AllowMultipleControls = $true
$dc.ControlId = $delegateControlId
 
#create a method object and invole the method
$bindingFlags = [Reflection.BindingFlags] "NonPublic,Instance"
$method = $dc.GetType().GetMethod("CreateChildControls", $bindingFlags)
$method.Invoke($dc, @());
 
#list the child controls
$dc.Controls | %{
	$_.GetType().BaseType
}
 
#dispose
$StringWriter.Dispose | Out-Null
$httpResponse.Close() | Out-Null

The code: