VB用API实现FTP上传文件，创建远程目录(类模块)

有空再注释一下
Option Explicit   Private Declare Function GetProcessHeap Lib "kernel32" () As Long  Private Declare Function HeapAlloc Lib "kernel32" (ByVal hHeap As Long, ByVal dwFlags As Long, ByVal dwBytes As Long) As Long  Private Declare Function HeapFree Lib "kernel32" (ByVal hHeap As Long, ByVal dwFlags As Long, lpMem As Any) As Long  Private Const HEAP_ZERO_MEMORY = &H8   Private Const HEAP_GENERATE_EXCEPTIONS = &H4   Private Declare Sub CopyMemory1 Lib "kernel32" Alias "RtlMoveMemory" (hpvDest As Any, ByVal hpvSource As Long, ByVal cbCopy As Long)   Private Declare Sub CopyMemory2 Lib "kernel32" Alias "RtlMoveMemory" (hpvDest As Long, hpvSource As Any, ByVal cbCopy As Long)   Private Const MAX_PATH = 260   Private Const NO_ERROR = 0   Private Const FILE_ATTRIBUTE_READONLY = &H1   Private Const FILE_ATTRIBUTE_HIDDEN = &H2   Private Const FILE_ATTRIBUTE_SYSTEM = &H4   Private Const FILE_ATTRIBUTE_DIRECTORY = &H10   Private Const FILE_ATTRIBUTE_ARCHIVE = &H20   Private Const FILE_ATTRIBUTE_NORMAL = &H80   Private Const FILE_ATTRIBUTE_TEMPORARY = &H100   Private Const FILE_ATTRIBUTE_COMPRESSED = &H800   Private Const FILE_ATTRIBUTE_OFFLINE = &H1000   Private Type FILETIME           dwLowDateTime As Long          dwHighDateTime As Long  End Type   Private Type WIN32_FIND_DATA           dwFileAttributes 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 * MAX_PATH           cAlternate As String * 14   End Type   Private Const ERROR_NO_MORE_FILES = 18   Private Declare Function InternetFindNextFile Lib "wininet.dll" Alias "InternetFindNextFileA" (ByVal hFind As Long, lpvFindData As WIN32_FIND_DATA) As Long  Private 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  Private Declare Function FtpCreateDirectory Lib "wininet.dll" Alias "FtpCreateDirectoryA" (ByVal hFtpSession As Long, ByVal lpszDirectory As String) As Boolean  Private 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  Private 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  Private Declare Function FtpSetCurrentDirectory Lib "wininet.dll" Alias "FtpSetCurrentDirectoryA" (ByVal hFtpSession As Long, ByVal lpszDirectory As String) As Boolean  Private 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  Private Const INTERNET_OPEN_TYPE_PRECONFIG = 0   Private Const INTERNET_OPEN_TYPE_DIRECT = 1   Private Const INTERNET_OPEN_TYPE_PROXY = 3   Private Const INTERNET_INVALID_PORT_NUMBER = 0   Private Const FTP_TRANSFER_TYPE_ASCII = &H1   Private Const FTP_TRANSFER_TYPE_BINARY = &H1   Private Const INTERNET_FLAG_PASSIVE = &H8000000   Private 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  Private Const ERROR_INTERNET_EXTENDED_ERROR = 12003   Private Declare Function InternetGetLastResponseInfo Lib "wininet.dll" Alias "InternetGetLastResponseInfoA" (lpdwError As Long, ByVal lpszBuffer As String, lpdwBufferLength As Long) As Boolean  Private Const INTERNET_DEFAULT_FTP_PORT = 21   Private Const INTERNET_DEFAULT_GOPHER_PORT = 70   Private Const INTERNET_DEFAULT_HTTP_PORT = 80   Private Const INTERNET_DEFAULT_HTTPS_PORT = 443   Private Const INTERNET_DEFAULT_SOCKS_PORT = 1080   Private Const INTERNET_OPTION_CONNECT_TIMEOUT = 2   Private Const INTERNET_OPTION_RECEIVE_TIMEOUT = 6   Private Const INTERNET_OPTION_SEND_TIMEOUT = 5   Private Const INTERNET_OPTION_USERNAME = 28   Private Const INTERNET_OPTION_PASSWORD = 29   Private Const INTERNET_OPTION_PROXY_USERNAME = 43   Private Const INTERNET_OPTION_PROXY_PASSWORD = 44   Private Const INTERNET_SERVICE_FTP = 1   Private Const INTERNET_SERVICE_GOPHER = 2   Private Const INTERNET_SERVICE_HTTP = 3   Private Declare Function HttpOpenRequest Lib "wininet.dll" Alias "HttpOpenRequestA" (ByVal hHttpSession As Long, ByVal sVerb As String, ByVal sObjectName As String, ByVal sVersion As String, ByVal sReferer As String, ByVal something As Long, ByVal lFlags As Long, ByVal lContext As Long) As Long  Private Const INTERNET_FLAG_RELOAD = &H80000000   Private Const INTERNET_FLAG_KEEP_CONNECTION = &H400000   Private Const INTERNET_FLAG_MULTIPART = &H200000   Private Const GENERIC_READ = &H80000000   Private Const GENERIC_WRITE = &H40000000     Private Declare Function HttpSendRequest Lib "wininet.dll" Alias "HttpSendRequestA" (ByVal hHttpRequest As Long, ByVal sHeaders As String, ByVal lHeadersLength As Long, ByVal sOptional As String, ByVal lOptionalLength As Long) As Integer  Private Declare Function HttpQueryInfo Lib "wininet.dll" Alias "HttpQueryInfoA" (ByVal hHttpRequest As Long, ByVal lInfoLevel As Long, ByRef sBuffer As Any, ByRef lBufferLength As Long, ByRef lIndex As Long) As Integer    Private Const HTTP_QUERY_CONTENT_TYPE = 1   Private Const HTTP_QUERY_CONTENT_LENGTH = 5   Private Const HTTP_QUERY_EXPIRES = 10   Private Const HTTP_QUERY_LAST_MODIFIED = 11   Private Const HTTP_QUERY_PRAGMA = 17   Private Const HTTP_QUERY_VERSION = 18   Private Const HTTP_QUERY_STATUS_CODE = 19   Private Const HTTP_QUERY_STATUS_TEXT = 20   Private Const HTTP_QUERY_RAW_HEADERS = 21   Private Const HTTP_QUERY_RAW_HEADERS_CRLF = 22   Private Const HTTP_QUERY_FORWARDED = 30   Private Const HTTP_QUERY_SERVER = 37   Private Const HTTP_QUERY_USER_AGENT = 39   Private Const HTTP_QUERY_SET_COOKIE = 43   Private Const HTTP_QUERY_REQUEST_METHOD = 45   Private Const HTTP_STATUS_DENIED = 401   Private Const HTTP_STATUS_PROXY_AUTH_REQ = 407   Private Const HTTP_QUERY_FLAG_REQUEST_HEADERS = &H80000000   Private Const HTTP_QUERY_FLAG_NUMBER = &H20000000   Private Declare Function InternetReadFile Lib "wininet.dll" (ByVal hFile As Long, ByVal sBuffer As String, ByVal lNumBytesToRead As Long, lNumberOfBytesRead As Long) As Integer  Private Declare Function InternetWriteFile Lib "wininet.dll" (ByVal hFile As Long, ByVal sBuffer As String, ByVal lNumberOfBytesToRead As Long, lNumberOfBytesRead As Long) As Integer  Private Declare Function FtpOpenFile Lib "wininet.dll" Alias "FtpOpenFileA" (ByVal hFtpSession As Long, ByVal sFileName As String, ByVal lAccess As Long, ByVal lFlags As Long, ByVal lContext As Long) As Long  Private Declare Function FtpDeleteFile Lib "wininet.dll" Alias "FtpDeleteFileA" (ByVal hFtpSession As Long, ByVal lpszFileName As String) As Boolean  Private Declare Function InternetSetOption Lib "wininet.dll" Alias "InternetSetOptionA" (ByVal hInternet As Long, ByVal lOption As Long, ByRef sBuffer As Any, ByVal lBufferLength As Long) As Integer  Private Declare Function InternetSetOptionStr Lib "wininet.dll" Alias "InternetSetOptionA" (ByVal hInternet As Long, ByVal lOption As Long, ByVal sBuffer As String, ByVal lBufferLength As Long) As Integer  Private Declare Function InternetCloseHandle Lib "wininet.dll" (ByVal hInet As Long) As Integer  Private Declare Function InternetQueryOption Lib "wininet.dll" Alias "InternetQueryOptionA" (ByVal hInternet As Long, ByVal lOption As Long, ByRef sBuffer As Any, ByRef lBufferLength As Long) As Integer  Private Const INTERNET_OPTION_VERSION = 40   Private Type tWinInetDLLVersion       lMajorVersion As Long      lMinorVersion As Long  End Type   Private Declare Function HttpAddRequestHeaders Lib "wininet.dll" Alias "HttpAddRequestHeadersA" (ByVal hHttpRequest As Long, ByVal sHeaders As String, ByVal lHeadersLength As Long, ByVal lModifiers As Long) As Integer  Private Const HTTP_ADDREQ_FLAG_ADD_IF_NEW = &H10000000   Private Const HTTP_ADDREQ_FLAG_ADD = &H20000000   Private Const HTTP_ADDREQ_FLAG_REPLACE = &H80000000   '=====================================================================   '软件版本   '=====================================================================   Private Const scUserAgent = "CMSDreamFTP ActiveX V1.0"    Private hConnection     As Long  Public LocalFile        As String  Public RemoteFile       As String  Public ServerName       As String  Public UserName         As String  Public Password         As String    '=====================================================================   '连接服务器   '=====================================================================   Public Function Connect(Optional m_ServerName As String, _                           Optional m_UserName As String, _                           Optional m_Password As String) As Boolean      Dim hOpen As Long      hOpen = InternetOpen(scUserAgent, INTERNET_OPEN_TYPE_DIRECT, vbNullString, vbNullString, 0)       If Trim(m_ServerName)  "" Then ServerName = m_ServerName       If Trim(m_UserName)  "" Then UserName = m_UserName       If Trim(m_Password)  "" Then Password = m_Password       hConnection = InternetConnect(hOpen, _                                     ServerName, _                                     INTERNET_INVALID_PORT_NUMBER, _                                     UserName, _                                     Password, _                                     INTERNET_SERVICE_FTP, _                                     INTERNET_FLAG_PASSIVE, _                                     0)       Connect = CBool(hConnection)       If Not Connect Then Err.Raise vbObjectError + 510, "Connect Function", "Connect to server failed:" & Err.Description   End Function    '=====================================================================   '从服务器断开连接   '=====================================================================   Public Function DisConnect() As Boolean      DisConnect = True      If hConnection  0 Then          hConnection = 0           DisConnect = CBool(InternetCloseHandle(hConnection))       End If  End Function    '=====================================================================   '文件传送   '=====================================================================   Public Function Transfer(Optional v_LocalFile As String, _                            Optional v_RemoteFile As String, _                            Optional m_ServerName As String, _                            Optional m_UserName As String, _                            Optional m_Password As String) As Boolean                                  If Trim(v_LocalFile)  "" Then LocalFile = v_LocalFile       If Trim(v_RemoteFile)  "" Then RemoteFile = v_RemoteFile              If Err.Number  0 Then Err.Clear       On Error Resume Next      Dim v_RemotePath As String: v_RemotePath = GetRemoteFolder(RemoteFile)              If hConnection = 0 Then          If Trim(m_ServerName)  "" Then ServerName = m_ServerName           If Trim(m_UserName)  "" Then UserName = m_UserName           If Trim(m_Password)  "" Then Password = m_Password           Call Connect(ServerName, UserName, Password)       End If      '=========================       '创建远程文件夹       '=========================       If v_RemotePath  "" Then          If Right(v_RemotePath, 1)  "/" Then v_RemotePath = v_RemotePath & "/"          Call CreateRemoteFolder(v_RemotePath)       End If             If Dir(LocalFile) = "" Then          Err.Raise vbObjectError + 512, "Transfer Function", "The local file is not exists:" & LocalFile           Err.Clear       End If             Transfer = FtpPutFile(hConnection, LocalFile, RemoteFile, FTP_TRANSFER_TYPE_BINARY, 0)       If Err Then          Err.Raise vbObjectError + 513, "Transfer Function", "Transfer the file failed:" & Err.Description           Err.Clear       End If  End Function    '=====================================================================   '创建远程文件夹   '=====================================================================   Public Sub CreateRemoteFolder(ByVal RemotePath As String)       If Trim(RemotePath) = "" Then Exit Sub      On Error Resume Next      Dim v_RemotePath As String: v_RemotePath = RemotePath       Dim aFolder As String, sPosition As Long      Dim i As Long: i = 0       sPosition = InStr(v_RemotePath, "/")       aFolder = ""      Do While sPosition > 0 And i < 100           sPosition = InStr(v_RemotePath, "/")           aFolder = aFolder & Left(v_RemotePath, sPosition)           v_RemotePath = Mid(v_RemotePath, sPosition + 1)           If Not (aFolder = "/" Or aFolder = "") Then              If Not FtpCreateDirectory(hConnection, aFolder) Then                  Err.Raise vbObjectError + 511, "CreateRemoteFolder Sub", "Create a remote folder failed:" & Err.Description                   Err.Clear               End If          End If          i = i + 1       Loop  End Sub    Private Function GetRemoteFolder(ByVal RemoteFilePath As String) As String      GetRemoteFolder = RemoteFilePath       If Trim(RemoteFilePath) = "" Then Exit Function      RemoteFilePath = Replace(RemoteFilePath, "\", "/")      If Right(RemoteFilePath, 1) = "/" Then Exit Function      GetRemoteFolder = Left(RemoteFilePath, InStrRev(RemoteFilePath, "/"))   End Function    Private Sub Class_Initialize()       '   End Sub    Private Sub Class_Terminate()       DisConnect   End Sub   ' 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