GetActiveObject clsid.ps1

Add-Type -TypeDefinition @'
using System;
using System.Runtime;
using System.Runtime.InteropServices;
public static class Marshal
{
    internal const String OLEAUT32 = "oleaut32.dll";

    public static Object GetActiveObject(Guid clsid)
    {
        Object obj = null;

        GetActiveObject(ref clsid, IntPtr.Zero, out obj);
        return obj;
    }

    //[DllImport(Microsoft.Win32.Win32Native.OLEAUT32, PreserveSig = false)]
    [DllImport(OLEAUT32, PreserveSig = false)]
    private static extern void GetActiveObject(ref Guid rclsid, IntPtr reserved, [MarshalAs(UnmanagedType.Interface)] out Object ppunk);

}
'@

$clsid = "{E123917B-8D61-4CCF-A1BB-F15551EAF442}"
$test = [Marshal]::GetActiveObject($clsid)
$test.hello()