Download a file from the internet (without a prompt dialog) using VB

Option Explicit
Private Declare Function URLDownloadToFile Lib "urlmon" Alias "URLDownloadToFileA" (ByVal pCaller As Long, ByVal szURL As String, ByVal szFileName As String, ByVal dwReserved As Long, ByVal lpfnCB As Long) As Long
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


'Purpose     :  Retreview text from a web site
'Inputs      :  sURLFileName            The URL and file name to download.
'               sSaveToFile             The filename to save the file to.
'               [bOverwriteExisting]    If True overwrites the file if it existings
'Outputs     :  Returns True on success.


Function InternetGetFile(sURLFileName As String, sSaveToFile As String, Optional bOverwriteExisting As Boolean = False) As Boolean
    Dim lRet As Long
    Const S_OK As Long = 0, E_OUTOFMEMORY = &H8007000E
    Const INTERNET_OPEN_TYPE_PRECONFIG = 0, INTERNET_FLAG_EXISTING_CONNECT = &H20000000
    Const INTERNET_OPEN_TYPE_DIRECT = 1, INTERNET_OPEN_TYPE_PROXY = 3
    Const INTERNET_FLAG_RELOAD = &H80000000
  
    On Error Resume Next
    'Create an internet connection
    lRet = InternetOpen("", INTERNET_OPEN_TYPE_DIRECT, vbNullString, vbNullString, 0)
  
    If bOverwriteExisting Then
        If Len(Dir$(sSaveToFile)) Then
            VBA.Kill sSaveToFile
        End If
    End If
    'Check file doesn't already exist
    If Len(Dir$(sSaveToFile)) = 0 Then
        'Download file
        lRet = URLDownloadToFile(0&, sURLFileName, sSaveToFile, 0&, 0)
        If Len(Dir$(sSaveToFile)) Then
            'File successfully downloaded
            InternetGetFile = True
        Else
            'Failed to download file
            If lRet = E_OUTOFMEMORY Then
                Debug.Print "The buffer length is invalid or there was insufficient memory to complete the operation."
            Else
                Debug.Assert False
                Debug.Print "Error occurred " & lRet & " (this is probably a proxy server error)."
            End If
            InternetGetFile = False
        End If
    End If
    On Error GoTo 0
  
End Function

'Demonstration routine, downloads an image from vbusers.com
'to the c: drive
Sub Test()
    If InternetGetFile("http://filename", "c:\filename", True) Then
        MsgBox "Successfully downloaded file!"
    Else
        MsgBox "Failed to download file!"
    End If
End Sub