[DllImport("advapi32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
        static extern int RegQueryInfoKey(UIntPtr hKey, [Out()]StringBuilder lpClass, ref uint lpcchClass,
           IntPtr lpReserved, out uint lpcSubkey, out uint lpcchMaxSubkeyLen,
           out uint lpcchMaxClassLen, out uint lpcValues, out uint lpcchMaxValueNameLen,
           out uint lpcbMaxValueLen, IntPtr lpSecurityDescriptor, IntPtr lpftLastWriteTime);

PowerShell

Add-Type declaration ( LastWriteTime only )

    Add-Type @'
    using Microsoft.Win32.SafeHandles;
    using System;
    using System.Runtime.InteropServices;

    public class API
    {
        [DllImport("Advapi32.dll", SetLastError=true)]
        [return: MarshalAs(UnmanagedType.Error)]
        public static extern int RegQueryInfoKey(
            SafeRegistryHandle      hkey,
            uint p2,uint p3,uint p4,uint p5,uint p6,
            uint p7,uint p8,uint p9,uint p10,uint p11,
            ref long        lpftLastWriteTime
        );
    }
    '@

Usage

    [long]$LastWrite = 0
    $key = Get-Item 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\Streams'
    [API]::RegQueryInfoKey($key.Handle,0,0,0,0,0,0,0,0,0,0,[ref]$LastWrite)
    [DateTime]::FromFileTime($LastWrite)