by Peter Elisa Souhoka (21 Submissions)
Category: Custom Controls/Forms/Menus
Compatability: VB 6.0
Difficulty: Unknown Difficulty
Originally Published: Thu 17th April 2008
Date Added: Mon 8th February 2021
Rating: 
(1 Votes)
VBFTP
API Declarations
Declare Function GetProcessHeap Lib "kernel32" () As Long
Declare Function HeapAlloc Lib "kernel32" (ByVal hHeap As Long, ByVal dwFlags As Long, ByVal dwBytes As Long) As Long
Declare Function HeapFree Lib "kernel32" (ByVal hHeap As Long, ByVal dwFlags As Long, lpMem As Any) As Long
Public Const HEAP_ZERO_MEMORY = &H8
Public Const HEAP_GENERATE_EXCEPTIONS = &H4
Declare Sub CopyMemory1 Lib "kernel32" Alias "RtlMoveMemory" ( _
hpvDest As Any, ByVal hpvSource As Long, ByVal cbCopy As Long)
Declare Sub CopyMemory2 Lib "kernel32" Alias "RtlMoveMemory" ( _
hpvDest As Long, hpvSource As Any, ByVal cbCopy As Long)
Public Const MAX_PATH = 260
Public Const NO_ERROR = 0
Public Const FILE_ATTRIBUTE_READONLY = &H1
Public Const FILE_ATTRIBUTE_HIDDEN = &H2
Public Const FILE_ATTRIBUTE_SYSTEM = &H4
Public Const FILE_ATTRIBUTE_DIRECTORY = &H10
Public Const FILE_ATTRIBUTE_ARCHIVE = &H20
Public Const FILE_ATTRIBUTE_NORMAL = &H80
Public Const FILE_ATTRIBUTE_TEMPORARY = &H100
Public Const FILE_ATTRIBUTE_COMPRESSED = &H800
Public Const FILE_ATTRIBUTE_OFFLINE = &H1000
Type FILETIME
dwLowDateTime As Long
dwHighDateTime As Long
End Type
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
Public Const ERROR_NO_MORE_FILES = 18
Public Declare Function InternetFindNextFile Lib "wininet.dll" Alias "InternetFindNextFileA" _
(ByVal hFind As Long, lpvFindData As WIN32_FIND_DATA) As Long
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 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 FtpSetCurrentDirectory Lib "wininet.dll" Alias "FtpSetCurrentDirectoryA" _
(ByVal hFtpSession As Long, ByVal lpszDirectory As String) As Boolean
' Initializes an application's use of the Win32 Internet functions
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
' User agent constant.
Public Const scUserAgent = "vb wininet"
' Use registry access settings.
Public Const INTERNET_OPEN_TYPE_PRECONFIG = 0
Public Const INTERNET_OPEN_TYPE_DIRECT = 1
Public Const INTERNET_OPEN_TYPE_PROXY = 3
Public Const INTERNET_INVALID_PORT_NUMBER = 0
Public Const FTP_TRANSFER_TYPE_ASCII = &H1
Public Const FTP_TRANSFER_TYPE_BINARY = &H1
Public Const INTERNET_FLAG_PASSIVE = &H8000000
' Opens a HTTP session for a given site.
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 Const ERROR_INTERNET_EXTENDED_ERROR = 12003
Public Declare Function InternetGetLastResponseInfo Lib "wininet.dll" Alias "InternetGetLastResponseInfoA" ( _
lpdwError As Long, _
ByVal lpszBuffer As String, _
lpdwBufferLength As Long) As Boolean
' Number of the TCP/IP port on the server to connect to.
Public Const INTERNET_DEFAULT_FTP_PORT = 21
Public Const INTERNET_DEFAULT_GOPHER_PORT = 70
Public Const INTERNET_DEFAULT_HTTP_PORT = 80
Public Const INTERNET_DEFAULT_HTTPS_PORT = 443
Public Const INTERNET_DEFAULT_SOCKS_PORT = 1080
Public Const INTERNET_OPTION_CONNECT_TIMEOUT = 2
Public Const INTERNET_OPTION_RECEIVE_TIMEOUT = 6
Public Const INTERNET_OPTION_SEND_TIMEOUT = 5
Public Const INTERNET_OPTION_USERNAME = 28
Public Const INTERNET_OPTION_PASSWORD = 29
Public Const INTERNET_OPTION_PROXY_USERNAME = 43
Public Const INTERNET_OPTION_PROXY_PASSWORD = 44
' Type of service to access.
Public Const INTERNET_SERVICE_FTP = 1
Public Const INTERNET_SERVICE_GOPHER = 2
Public Const INTERNET_SERVICE_HTTP = 3
' Opens an HTTP request handle.
Public 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
' Brings the data across the wire even if it locally cached.
Public Const INTERNET_FLAG_RELOAD = &H80000000
Public Const INTERNET_FLAG_KEEP_CONNECTION = &H400000
Public Const INTERNET_FLAG_MULTIPART = &H200000
Public Const GENERIC_READ = &H80000000
Public Const GENERIC_WRITE = &H40000000
' Sends the specified request to the HTTP server.
Public 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
VBcoders
Dim hOpen As Long, hConnection As Long
Dim dwType As Long
Dim EnumItemNameBag As New Collection
Dim EnumItemAttributeBag As New Collection
Private Sub Form_Load()
bActiveSession = False
hOpen = 0
hConnection = 0
chkPassive.Value = 1
optBin.Value = 1
dwType = FTP_TRANSFER_TYPE_BINARY
Dim imgI As ListImage
Set imgI = ImageList1.ListImages.Add(, "open", LoadPicture("open.bmp"))
Set imgI = ImageList1.ListImages.Add(, "closed", LoadPicture("closed.bmp"))
Set imgI = ImageList1.ListImages.Add(, "leaf", LoadPicture("leaf.bmp"))
Set imgI = ImageList1.ListImages.Add(, "root", LoadPicture("root.bmp"))
TreeView1.ImageList = ImageList1
TreeView1.Style = tvwTreelinesPictureText
EnableUI (False)
End Sub
Private Sub Form_Unload(Cancel As Integer)
cmdClosehOpen_Click
End Sub
Private Sub cmdInternetOpen_Click()
If Len(txtProxy.Text) <> 0 Then
hOpen = InternetOpen(scUserAgent, INTERNET_OPEN_TYPE_PROXY, txtProxy.Text, vbNullString, 0)
Else
hOpen = InternetOpen(scUserAgent, INTERNET_OPEN_TYPE_DIRECT, vbNullString, vbNullString, 0)
End If
If hOpen = 0 Then ErrorOut Err.LastDllError, "InternetOpen"
EnableUI (True)
End Sub
Private Sub cmdClosehOpen_Click()
If hConnection <> 0 Then InternetCloseHandle (hConnection)
If hOpen <> 0 Then InternetCloseHandle (hOpen)
hConnection = 0
hOpen = 0
If bActiveSession Then TreeView1.Nodes.Remove txtServer.Text
bActiveSession = False
ClearTextBoxAndBag
EnableUI (False)
End Sub
Private Sub cmdConnect_Click()
If Not bActiveSession And hOpen <> 0 Then
If txtServer.Text = "" Then
MsgBox "Please enter a server name!"
Exit Sub
End If
Dim nFlag As Long
If chkPassive.Value Then
nFlag = INTERNET_FLAG_PASSIVE
Else
nFlag = 0
End If
hConnection = InternetConnect(hOpen, txtServer.Text, INTERNET_INVALID_PORT_NUMBER, _
txtUser, txtPassword, INTERNET_SERVICE_FTP, nFlag, 0)
If hConnection = 0 Then
bActiveSession = False
ErrorOut Err.LastDllError, "InternetConnect"
Else
bActiveSession = True
EnableUI (CBool(hOpen))
FillTreeViewControl (txtServer.Text)
FtpEnumDirectory ("")
If EnumItemNameBag.Count = 0 Then Exit Sub
FillTreeViewControl (txtServer.Text)
End If
End If
End Sub
Private Sub cmdDisconnect_Click()
bDirEmpty = True
If hConnection <> 0 Then InternetCloseHandle hConnection
hConnection = 0
ClearBag
TreeView1.Nodes.Remove txtServer.Text
bActiveSession = False
EnableUI (True)
End Sub
Private Sub ClearTextBoxAndBag()
txtServer.Text = ""
txtUser.Text = ""
txtPassword.Text = ""
txtProxy.Text = ""
ClearBag
End Sub
Private Sub ClearBag()
Dim Num As Integer
For Num = 1 To EnumItemNameBag.Count
EnumItemNameBag.Remove 1
Next Num
For Num = 1 To EnumItemAttributeBag.Count
EnumItemAttributeBag.Remove 1
Next Num
End Sub
Private Sub FillTreeViewControl(strParentKey As String)
Dim nodX As Node
Dim strImg As String
Dim nCount As Integer, i As Integer
Dim nAttr As Integer
Dim strItem As String
If EnumItemNameBag.Count = 0 And strParentKey = txtServer.Text Then
Set nodX = TreeView1.Nodes.Add(, tvwFirst, txtServer.Text, txtServer.Text, "root")
Exit Sub
End If
nCount = EnumItemAttributeBag.Count
If nCount = 0 Then Exit Sub
For i = 1 To nCount
nAttr = EnumItemAttributeBag.Item(i)
strItem = EnumItemNameBag(i)
If nAttr = FILE_ATTRIBUTE_DIRECTORY Then
strImg = "closed"
Else
strImg = "leaf"
End If
Set nodX = TreeView1.Nodes.Add(strParentKey, tvwChild, strParentKey & "/" & strItem, _
strParentKey & "/" & strItem, strImg)
Next
nodX.EnsureVisible
End Sub
Private Sub cmdGet_Click()
Dim bRet As Boolean
Dim szFileRemote As String, szDirRemote As String, szFileLocal As String
Dim szTempString As String
Dim nPos As Long, nTemp As Long
Dim nodX As Node
Set nodX = TreeView1.SelectedItem
If bActiveSession Then
If nodX Is Nothing Then
MsgBox "Please select the item to GET!"
Exit Sub
End If
szTempString = TreeView1.SelectedItem.Text
szFileRemote = szTempString
nPos = 0
nTemp = 0
Do
nTemp = InStr(1, szTempString, "/", vbBinaryCompare)
If nTemp = 0 Then Exit Do
szTempString = Right(szTempString, Len(szTempString) - nTemp)
nPos = nTemp + nPos
Loop
szDirRemote = Left(szFileRemote, nPos)
szFileRemote = Right(szFileRemote, Len(szFileRemote) - nPos)
szFileLocal = File1.Path
rcd szDirRemote
bRet = FtpGetFile(hConnection, szFileRemote, szFileLocal & "/" & szFileRemote, False, _
INTERNET_FLAG_RELOAD, dwType, 0)
File1.Refresh
If bRet = False Then ErrorOut Err.LastDllError, "FtpGetFile"
Else
MsgBox "Not in session"
End If
End Sub
Private Sub cmdPut_Click()
Dim bRet As Boolean
Dim szFileRemote As String, szDirRemote As String, szFileLocal As String
Dim szTempString As String
Dim nPos As Long, nTemp As Long
Dim nodX As Node
Set nodX = TreeView1.SelectedItem
If bActiveSession Then
If nodX Is Nothing Then
MsgBox "Please select a remote directory to PUT to!"
Exit Sub
End If
If nodX.Image = "leaf" Then
MsgBox "Please select a remote directory to PUT to!"
Exit Sub
End If
If File1.FileName = "" Then
MsgBox "Please select a local file to put"
Exit Sub
End If
szTempString = nodX.Text
szDirRemote = Right(szTempString, Len(szTempString) - Len(txtServer.Text))
szFileRemote = File1.FileName
szFileLocal = File1.Path & "\" & File1.FileName
If (szDirRemote = "") Then szDirRemote = "\"
rcd szDirRemote
bRet = FtpPutFile(hConnection, szFileLocal, szFileRemote, _
dwType, 0)
If bRet = False Then
ErrorOut Err.LastDllError, "FtpPutFile"
Exit Sub
End If
Dim nodChild As Node, nodNextChild As Node
Set nodChild = nodX.Child
Do
If nodChild Is Nothing Then Exit Do
Set nodNextChild = nodChild.Next
TreeView1.Nodes.Remove nodChild.Index
If nodNextChild Is Nothing Then Exit Do
Set nodChild = nodNextChild
Loop
If nodX.Image = "closed" Then
nodX.Image = "open"
End If
FtpEnumDirectory (nodX.Text)
FillTreeViewControl (nodX.Text)
End If
End Sub
Private Sub Dir1_Change()
File1.Path = Dir1.Path
End Sub
Private Sub Drive1_Change()
On Error GoTo ErrProc
Dir1.Path = Drive1.Drive
Exit Sub
ErrProc:
Drive1.Drive = "c:"
Dir1.Path = Drive1.Drive
End Sub
Private Sub rcd(pszDir As String)
If pszDir = "" Then
MsgBox "Please enter the directory to CD"
Exit Sub
Else
Dim sPathFromRoot As String
Dim bRet As Boolean
If InStr(1, pszDir, txtServer.Text) Then
sPathFromRoot = Mid(pszDir, Len(txtServer.Text) + 1, Len(pszDir) - Len(txtServer.Text))
Else
sPathFromRoot = pszDir
End If
If sPathFromRoot = "" Then sPathFromRoot = "/"
bRet = FtpSetCurrentDirectory(hConnection, sPathFromRoot)
If bRet = False Then ErrorOut Err.LastDllError, "rcd"
End If
End Sub
Function ErrorOut(dError As Long, szCallFunction As String)
Dim dwIntError As Long, dwLength As Long
Dim strBuffer As String
If dError = ERROR_INTERNET_EXTENDED_ERROR Then
InternetGetLastResponseInfo dwIntError, vbNullString, dwLength
strBuffer = String(dwLength + 1, 0)
InternetGetLastResponseInfo dwIntError, strBuffer, dwLength
MsgBox szCallFunction & " Extd Err: " & dwIntError & " " & strBuffer
End If
If MsgBox(szCallFunction & " Err: " & dError & _
vbCrLf & "Close Connection and Session?", vbYesNo) = vbYes Then
If hConnection Then InternetCloseHandle hConnection
If hOpen Then InternetCloseHandle hOpen
hConnection = 0
hOpen = 0
If bActiveSession Then TreeView1.Nodes.Remove txtServer.Text
bActiveSession = False
ClearTextBoxAndBag
EnableUI (False)
End If
End Function
Private Sub EnableUI(bEnabled As Boolean)
txtServer.Enabled = bEnabled
txtUser.Enabled = bEnabled
txtPassword.Enabled = bEnabled
cmdConnect.Enabled = bEnabled And Not bActiveSession
cmdDisconnect.Enabled = bEnabled And bActiveSession
chkPassive.Enabled = bEnabled
cmdClosehOpen.Enabled = bEnabled
cmdInternetOpen.Enabled = Not bEnabled
txtProxy.Enabled = Not bEnabled
optBin.Enabled = bEnabled
optAscii.Enabled = bEnabled
cmdGet.Enabled = bEnabled And bActiveSession
cmdPut.Enabled = bEnabled And bActiveSession
End Sub
Private Sub FtpEnumDirectory(strDirectory As String)
ClearBag
Dim hFind As Long
Dim nLastError As Long
Dim dError As Long
Dim ptr As Long
Dim pData As WIN32_FIND_DATA
If Len(strDirectory) > 0 Then rcd (strDirectory)
pData.cFileName = String(MAX_PATH, 0)
hFind = FtpFindFirstFile(hConnection, "*.*", pData, 0, 0)
nLastError = Err.LastDllError
If hFind = 0 Then
If (nLastError = ERROR_NO_MORE_FILES) Then
MsgBox "This directory is empty!"
Else
ErrorOut nLastError, "FtpFindFirstFile"
End If
Exit Sub
End If
dError = NO_ERROR
Dim bRet As Boolean
Dim strItemName As String
EnumItemAttributeBag.Add pData.dwFileAttributes
strItemName = Left(pData.cFileName, InStr(1, pData.cFileName, String(1, 0), vbBinaryCompare) - 1)
EnumItemNameBag.Add strItemName
Do
pData.cFileName = String(MAX_PATH, 0)
bRet = InternetFindNextFile(hFind, pData)
If Not bRet Then
dError = Err.LastDllError
If dError = ERROR_NO_MORE_FILES Then
Exit Do
Else
ErrorOut dError, "InternetFindNextFile"
InternetCloseHandle (hFind)
Exit Sub
End If
Else
EnumItemAttributeBag.Add pData.dwFileAttributes
strItemName = Left(pData.cFileName, InStr(1, pData.cFileName, String(1, 0), vbBinaryCompare) - 1)
EnumItemNameBag.Add strItemName
End If
Loop
InternetCloseHandle (hFind)
End Sub
Private Sub optAscii_Click()
dwType = FTP_TRANSFER_TYPE_ASCII
End Sub
Private Sub optBin_Click()
dwType = FTP_TRANSFER_TYPE_BINARY
End Sub
Private Sub TreeView1_DblClick()
Dim nodX As Node
Set nodX = TreeView1.SelectedItem
If Not bActiveSession Then
MsgBox "No in session!"
Exit Sub
End If
If nodX Is Nothing Then
MsgBox "no Selection to enumerate"
End If
If nodX.Image = "closed" Then
nodX.Image = "open"
FtpEnumDirectory (nodX.Text)
FillTreeViewControl (nodX.Text)
Else
If nodX.Image = "open" Then
nodX.Image = "closed"
Dim nodChild As Node, nodNextChild As Node
Set nodChild = nodX.Child
Do
Set nodNextChild = nodChild.Next
TreeView1.Nodes.Remove nodChild.Index
If nodNextChild Is Nothing Then Exit Do
Set nodChild = nodNextChild
Loop
End If
End If
End Sub
