用vb实现ftp的上传下载

Option Explicit

Public Declare Function InternetOpen Lib "wininet.dll" Alias "InternetOpenA" _
(ByVal sAgent As String, ByVal LAccessType As Long, ByVal sProxyName As String, _
ByVal SProxyBypass As String, ByVal lFlags As Long) As Long

Public Declare Function InternetConnect Lib "wininet.dll" Alias "InternetConnectA" _
(ByVal hInternetSession As Long, ByVal sServerName As String, _
ByVal nServerPort As Integer, ByVal sUsername As String, _
ByVal sPassword As String, ByVal lService As Long, _
ByVal lFlags As Long, ByVal lContext As Long) As Long

Public Declare Function FtpGetFile Lib "wininet.dll" Alias "FtpGetFileA" _
(ByVal hFtpSession As Long, ByVal lpszRemoteFile As String, _
ByVal lpszNewFile As String, ByVal fFailIfExists As Boolean, _
ByVal dwFlagsAndAttributes As Long, ByVal dwFlags As Long, _
ByVal dwContext As Long) As Boolean

Public Declare Function FtpPutFile Lib "wininet.dll" Alias "FtpPutFileA" _
(ByVal hFtpSession As Long, ByVal lpszLocalFile As String, _
ByVal lpszRemoteFile As String, ByVal dwFlags As Long, _
ByVal dwContext As Long) As Boolean

Public Declare Function FtpDeleteFile Lib "wininet.dll" Alias "FtpDeleteFileA" _
  (ByVal hFtpSession As Long, ByVal lpszFileName As String) As Boolean
 
Public Declare Function FtpRenameFile Lib "wininet.dll" Alias "FtpRenameFileA" _
  (ByVal hFtpSession As Long, ByVal lpszExsiting As String, ByVal lpszNew As String) As Boolean
 
Public Declare Function InternetCloseHandle Lib "wininet.dll" (ByVal hInet As Long) As Integer

Public Declare Function FtpFindFirstFile Lib "wininet.dll" Alias "FtpFindFirstFileA" _
   (ByVal hFtpSession As Long, ByVal lpszSearchFile As String, _
    lpFindFileData As WIN32_FIND_DATA, ByVal dwFlags As Long, _
    ByVal dwContent As Long) As Long
   
Public Declare Function InternetFindNextFile Lib "wininet.dll" Alias "InternetFindNextFileA" _
(ByVal hFind As Long, lpvFndData As WIN32_FIND_DATA) As Long

Public Type FILETIME
  dwLowDateTime As Long
  dwHighDateTime As Long
End Type
Public Type WIN32_FIND_DATA
   dwFilAttributes As Long
   ftCreationTime As FILETIME
   ftLastAccessTime As FILETIME
   ftLastWriteTime As FILETIME
   nFileSizeHigh As Long
   nFileSizeLow As Long
   dwReserved0 As Long
   dwReserved1 As Long
   cFileName As String * 260
   cAlternate As String * 14
End Type

 
Public Declare Function GetOpenFileName Lib "comdlg32.dll" Alias _
        "GetOpenFileNameA" (pOpenfilename As OPENFILENAME) As Long
 
Type OPENFILENAME
     lStructSize As Long
     hwndOwner As Long
     hInstance As Long
     lpstrFilter As String
     lpstrCustomFilter As String
     nMaxCustFilter As Long
     nFilterIndex As Long
     lpstrFile As String
     nMaxFile As Long
     lpstrFileTitle As String
     nMaxFileTitle As Long
     lpstrInitialDir As String
     lpstrTitle As String
     flags As Long
     nFileOffset As Integer
     nFileExtension As Integer
     lpstrDefExt As String
     lCustData As Long
     lpfnHook As Long
     lpTemplateName As String
End Type
Private Sub Command1_Click()
lnginet = InternetOpen(vbNullString, INTERNET_OPEN_TYPE_PRECONFIG, _
   vbNullString, vbNullString, 0&)
If lnginet Then
  lnginetconn = InternetConnect(lnginet, "ip地址", 0, _
        "用户名", "密码", 1, 0, 0)
  If lnginetconn Then
      blnRC = FtpGetFile(lnginetconn, "website/address.asp", "c:\address.asp", 0, 0, 1, 0)
      If blnRC Then
        MsgBox "download ok!!!"
      End If
      InternetCloseHandle lnginetconn
      InternetCloseHandle lnginet
      MsgBox "close ok!!!"
  Else
     MsgBox "can't connect"
  End If
Else
     MsgBox "ftp wrong"
End If
End Sub

Private Sub Command2_Click()
Dim pData As WIN32_FIND_DATA
Dim lngHINet As Long
Dim intError As Integer
Dim strTemp As String
Dim blnRC As Boolean
pData.cFileName = String(260, 0)
lnginet = InternetOpen(vbNullString, INTERNET_OPEN_TYPE_PRECONFIG, _
   vbNullString, vbNullString, 0&)
If lnginet Then
  lnginetconn = InternetConnect(lnginet, "IP地址", 0, _
        "用户名", "密码", 1, 0, 0)
   If lnginetconn Then
   lngHINet = FtpFindFirstFile(lnginetconn, "*.*", pData, 0, 0)
   strTemp = Left(pData.cFileName, InStr(1, pData.cFileName, String(1, 0), vbBinaryCompare) - 1)
   Do
      pData.cFileName = String(260, 0)
      blnRC = InternetFindNextFile(lngHINet, pData)
      If Not blnRC Then
          Exit Do
      Else
         strTemp = Left(pData.cFileName, InStr(1, pData.cFileName, String(1, 0), vbBinaryCompare) - 1)
      End If
     
   Loop
   Text1.Text = strTemp
  End If
  End If
   InternetCloseHandle lngHINet
  
   InternetCloseHandle lnginetconn
      InternetCloseHandle lnginet
  
  
End Sub

本文地址：http://com.8s8s.com/it/it41907.htm