vb FTP 怎么实现BIN 模式下载文件呀

[syf255]

现写的代码在下载完之后，碰到有些服务器下载来的文件会是乱码，查了一下，用命令行bin模式下载，不会改变其原来编码，不会造成这种现象。 我想象CMD命令里那样，连接成功之后，下个命令bin.就转换成这个binmary模式了，这个api里有没有这样的。
我原来用的是这几个实现下载的。这里可以改进实现我上述的功能吗？
internetOpen
InternetConnect
FtpGetFile



Private Const FTP_TRANSFER_TYPE_UNKNOWN = &H0
Private Const FTP_TRANSFER_TYPE_ASCII = &H1
Private Const FTP_TRANSFER_TYPE_BINARY = &H2
Private Const INTERNET_FLAG_RELOAD = &H80000000
Private Const FILE_ATTRIBUTE_NORMAL = &H80

InternetOpen("vb wininet", 1, vbNullString, vbNullString, 0)
InternetConnect(mFTPOpen, mAddress, mPoint, mUser, mPassWord, 1, 0, 0) 连接
FtpGetFile(mFTPConn, RomeFileName, LocalPath, False, FILE_ATTRIBUTE_NORMAL, FTP_TRANSFER_TYPE_BINARY Or INTERNET_FLAG_RELOAD, 0) 下载

[zhchyun2008]

没有看懂，帮顶。vb都快忘光了

[赵4老师]

仅供参考：

VERSION 5.00
Object = "{48E59290-9880-11CF-9754-00AA00C00908}#1.0#0"; "MSINET.OCX"
Begin VB.Form Form1
   BorderStyle     =   1  'Fixed Single
   ClientHeight    =   3060
   ClientLeft      =   45
   ClientTop       =   330
   ClientWidth     =   4035
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   3060
   ScaleWidth      =   4035
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command1
      Caption         =   "下载"
      Height          =   495
      Left            =   1440
      TabIndex        =   0
      Top             =   1320
      Width           =   1215
   End
   Begin InetCtlsObjects.Inet Inet1
      Left            =   -15
      Top             =   -15
      _ExtentX        =   1005
      _ExtentY        =   1005
      _Version        =   393216
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Dim ExeStr As String
Dim Done As Boolean
Private Sub cmd(cmdstr As String)
    Do
        If Inet1.StillExecuting = False Then Exit Do
    Loop
    ExeStr = cmdstr
    Done = False
    Debug.Print ExeStr; "="
    Inet1.Execute , ExeStr
    Do
        DoEvents
        If Done Then Exit Do
    Loop
End Sub
Public Sub ReadNewFile(File As String)
    Inet1.URL = "ftp://123.123.123.123"
    Inet1.UserName = "username"
    Inet1.Password = "password"

    'cmd "PWD"
    'cmd "CD ../files"
    'cmd "DIR"
    'cmd "GET " + File + App.Path + "\" + File

    cmd "GET ../files/" + File + App.Path + "\" + File

    cmd "QUIT"
End Sub

Private Sub Command1_Click()
    Command1.Enabled = False
    ReadNewFile ("aFile.ext")
    Command1.Enabled = True
End Sub

Private Sub Inet1_StateChanged(ByVal State As Integer)
Dim intFile As Integer
Dim vtData() As Byte
Dim str As String
'On Error GoTo ISCerr
    Debug.Print "State="; State,
    Select Case State
    Case 0
        Debug.Print "icNone"
    Case 1
        Debug.Print "icHostResolvingHost"
    Case 2
        Debug.Print "icHostResolved"
    Case 3
        Debug.Print "icConnecting"
    Case 4
        Debug.Print "icConnected"
    Case 5
        Debug.Print "icRequesting"
    Case 6
        Debug.Print "icRequestSent"
    Case 7
        Debug.Print "icReceivingResponse"
    Case 8
        Debug.Print "icResponseReceived"
        If Left(ExeStr, 2) = "CD" Then Done = True
    Case 9
        Debug.Print "icDisconnecting"
    Case 10
        Debug.Print "icDisconnected"
        Done = True
    Case 11
        Debug.Print "icError of [" + ExeStr + "]="; Inet1.ResponseInfo
        Done = True
    Case 12
        Debug.Print "icResponseCompleted----------------"
        Do
            str = Inet1.GetChunk(1024, icString)
            If LenB(str) = 0 Then Exit Do
            Debug.Print str
        Loop
        Done = True
    End Select
    Exit Sub
ISCerr:
    Resume Next
End Sub