Retrieves the control elements registered for a given delegate control ID.

Get-SPControlElement.ps1

<#
.Synopsis
   Retrieves the control elements registered for a given delegate control ID.
.DESCRIPTION
   Retrieves the control elements registered for a given delegate control ID.
.EXAMPLE
   Get-SPControlElement -Web "http://demo" -ControlId "QuickLaunchDataSource" -TopOnly
.EXAMPLE
   Get-SPControlElement -Web "http://demo" -ControlId "QuickLaunchDataSource" -Scope "Web"
#>
function Get-SPControlElement {
    [CmdletBinding()]
    Param (
        # Specify the URL of an existing Site or an existing SPWeb object.
        [Parameter(Mandatory = $true,
                   ValueFromPipelineByPropertyName = $true,
                   ValueFromPipeline = $true,
                   Position = 0)]
        [Microsoft.SharePoint.PowerShell.SPWebPipeBind]
        $Web,
 
        # The ID of the delegate control to return instances of.
        [Parameter(Mandatory = $true,
                   ValueFromPipelineByPropertyName = $true,
                   ValueFromPipeline = $false,
                   Position = 1)]
        [string]
        $ControlId,
 
        # If specified, query for the top element only. If not specified, show all controls registered for the control ID.
        [Parameter(Mandatory = $false,
                   Position = 2)]
        [Switch]
        $TopOnly,
 
        # The scope to search for. Valid values are "Farm", "WebApplication", "Site", and "Web". To show controls registered at all scopes omit the parameter or pass in a $null value.
        [Parameter(Mandatory = $false,
                   Position = 3)]
        [string]
        $Scope
    )
 
    Begin {
        $bindings = @("InvokeMethod", "NonPublic", "Instance", "CreateInstance", "Public")
        $asm = [System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint")
        $type = $asm.GetType("Microsoft.SharePoint.SPElementProvider")
        $constructor = $type.GetConstructor($bindings, $null, @(), $null)
        $provider = $constructor.Invoke(@())
    }
    Process {
        $spWeb = $Web.Read()
        if ($TopOnly) {
            $method = $type.GetMethod("QueryForTopControlElement", $bindings)
        } else {
            $method = $type.GetMethod("QueryForControlElements", $bindings)
        }
        $method.Invoke($provider, @([Microsoft.SharePoint.SPWeb]$spWeb, $Scope, $ControlId))
        $spWeb.Dispose()
    }
    End {
    }
}