Download a web page on the internet (works with proxy servers) using VB

Option Explicit
Private Declare Function InternetOpen Lib "wininet" 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 Declare Function InternetCloseHandle Lib "wininet" (ByVal hInet As Long) As Integer
Private Declare Function InternetReadFile Lib "wininet" (ByVal hFile As Long, ByVal sBuffer As String, ByVal lNumBytesToRead As Long, lNumberOfBytesRead As Long) As Integer
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 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 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 Declare Function HttpSendRequest Lib "wininet.dll" Alias "HttpSendRequestA" (ByVal hHttpRequest As Long, ByVal sHeaders As String, ByVal lHeadersLength As Long, sOptional As Any, ByVal lOptionalLength As Long) As Integer



'Purpose     :  Retreview text from a web site
'Inputs      :  sServerName             The server name where the file is located eg.
'               sFileName               The file name to download eg. "index.asp" or "/code/codetoc.asp"
'               [sUsername]             If required, the login user name.
'               [sPassword]             If required, the user's password.
'               [lBufferSize]           The size of that the packets data downloaded in.
'Outputs     :  The contents of the specified file
'Notes       :  Can be used through a proxy server by specifying a username and password
'Revisions   :

Function InternetGetText(sServerName As String, sFileName As String, Optional sUsername As String = vbNullString, Optional sPassword As String = vbNullString, Optional lBufferSize As Long = -1) As String
    Dim hInternetSession As Long, hInternetConnect As Long, hHttpOpenRequest As Long
    Dim lRetVal As Long, lLenFile As Long, lNumberOfBytesRead As Long, lResLen As Long
    Dim sBuffer As String, lTotalBytesRead As Long
  
    Const clBufferIncrement As Long = 2000, scUserAgent As String = "VBUsers"
    Const INTERNET_OPEN_TYPE_PRECONFIG = 0, INTERNET_FLAG_EXISTING_CONNECT = &H20000000
    Const INTERNET_OPEN_TYPE_DIRECT = 1, INTERNET_OPEN_TYPE_PROXY = 3
    Const INTERNET_DEFAULT_HTTP_PORT = 80, INTERNET_FLAG_RELOAD = &H80000000
    Const INTERNET_SERVICE_HTTP = 3
    Const HTTP_QUERY_CONTENT_LENGTH = 5
  
    If lBufferSize = -1 Then
        'Create an arbitary buffer to read the whole file in parts
        sBuffer = String$(clBufferIncrement, vbNullChar)
        lBufferSize = clBufferIncrement
    Else
        'Create a specified buffer size
        sBuffer = String$(lBufferSize, vbNullChar)
    End If
  
    'Initializes an application's use of the Win32 Internet functions
    hInternetSession = InternetOpen(scUserAgent, INTERNET_OPEN_TYPE_PRECONFIG, vbNullString, vbNullString, 0)
    'Opens an FTP, Gopher, or HTTP session for a given site
    hInternetConnect = InternetConnect(hInternetSession, sServerName, INTERNET_DEFAULT_HTTP_PORT, sUsername, sPassword, INTERNET_SERVICE_HTTP, 0, 0)
    'Create an HTTP request handle
    hHttpOpenRequest = HttpOpenRequest(hInternetConnect, "GET", sFileName, "HTTP/1.0", vbNullString, 0, INTERNET_FLAG_RELOAD, 0)
  
    'Creates a new HTTP request handle and stores the specified parameters in that handle
    lRetVal = HttpSendRequest(hHttpOpenRequest, vbNullString, 0, 0, 0)
    If lRetVal Then
        'Determine the file size
        lResLen = lBufferSize
        lRetVal = HttpQueryInfo(hHttpOpenRequest, HTTP_QUERY_CONTENT_LENGTH, ByVal sBuffer, lResLen, 0)
        If lRetVal Then
            'Successfully returned file length
            lLenFile = Val(Left$(sBuffer, lResLen))
            'Create a buffer to hold file
            sBuffer = String$(lLenFile, vbNullChar)
            lBufferSize = lLenFile
        Else
            'Unable to establish file length
            lLenFile = -1
        End If
      
        'Read the file
        Do
            lRetVal = InternetReadFile(hHttpOpenRequest, sBuffer, lBufferSize, lNumberOfBytesRead)
            'Store the results
            InternetGetText = InternetGetText & Left$(sBuffer, lNumberOfBytesRead)
            lTotalBytesRead = lTotalBytesRead + lNumberOfBytesRead
            If lNumberOfBytesRead = 0 Or lTotalBytesRead = lLenFile Or lRetVal = 0 Then
                'Finished reading file
                Exit Do
            End If
        Loop
    End If
    'Close handles
    InternetCloseHandle hHttpOpenRequest
    InternetCloseHandle hInternetSession
    InternetCloseHandle hInternetConnect
End Function

'Demonstration routine
'(Note the Debug window will only show the last 255 lines)
Sub Test()
    Dim sInternetFile As String
    sInternetFile = InternetGetText("www.example", "/index.asp", "myusername", "mypassword")
    Debug.Print "File Donwloaded: " & vbNewLine
    Debug.Print sInternetFile
End Sub