ごみ箱にあるファイルのサイズと個数を取得する

Imports System
Imports System.Runtime.InteropServices

Namespace SantaMarta.Tips.RecycleBin

    Class QueryRecycleBin

        <DllImport("shell32.dll", CharSet:=CharSet.Auto)> _
        Friend Shared Function SHQueryRecycleBin( _
            ByVal pszRootPath As String, _
            <MarshalAs(UnmanagedType.Struct)> ByRef pSHQueryRBInfo As LPSHQUERYRBINFO) _
            As Integer
        End Function

        <StructLayout(LayoutKind.Sequential, Pack:=4)> _
        Friend Structure LPSHQUERYRBINFO

            Public cbSize As Integer
            Public i64Size As Long
            Public i64NumItems As Long

        End Structure

        Friend Const S_OK As Integer = 0

        ''' <summary>
        ''' アプリケーションのメイン エントリ ポイントです。
        ''' </summary>
        Shared Sub Main(ByVal args As String())

            Dim info As LPSHQUERYRBINFO
            Dim result As Integer

            For Each drive As String In Environment.GetLogicalDrives()

                info = New LPSHQUERYRBINFO
                info.cbSize = Marshal.SizeOf(info)

                result = SHQueryRecycleBin(drive, info)

                Console.Write("{0}ドライブ / ", drive.Chars(0))

                If result = S_OK Then

                    Console.WriteLine("ファイル: {0:0} 個、サイズ: {1:###,###,##0} Bytes", info.i64NumItems, info.i64Size)

                Else

                    Console.WriteLine("取得できませんでした。")

                End If

            Next

        End Sub

    End Class

End Namespace

using System;
using System.Runtime.InteropServices;

namespace SantaMarta.Tips.RecycleBin
{
    class QueryRecycleBin
    {
        [DllImport( "shell32.dll", CharSet = CharSet.Auto )]
        internal static extern uint SHQueryRecycleBin(
            string pszRootPath,
            [MarshalAs( UnmanagedType.Struct )]ref LPSHQUERYRBINFO pSHQueryRBInfo );

        [StructLayout( LayoutKind.Sequential, Pack = 4 )]
        internal struct LPSHQUERYRBINFO
        {
            public uint cbSize;
            public ulong i64Size;
            public ulong i64NumItems;
        }

        internal const uint S_OK = 0;

        /// <summary>
        /// アプリケーションのメイン エントリ ポイントです。
        /// </summary>
        [STAThread]
        static void Main(string[] args)
        {
            LPSHQUERYRBINFO info;
            uint result;
    
            foreach ( string drive in Environment.GetLogicalDrives() )
            {
                info = new LPSHQUERYRBINFO();
                info.cbSize = (uint)Marshal.SizeOf( info );

                result = SHQueryRecycleBin( drive, ref info );

                Console.Write( "{0}ドライブ / ", drive[0] );

                if ( result == S_OK ) 
                {
                    Console.WriteLine( "ファイル: {0:0} 個、サイズ: {1:###,###,##0} Bytes", info.i64NumItems, info.i64Size );
                }
                else
                {
                    Console.WriteLine( "取得できませんでした。" );
                }
            }
        }
    }
}