Excel VBA URLDownloadToFile Error for HTTPSresourc

Question

I try to download a file from a Server in Excel using VBA. This works fine when using HTTP but doesn't work using HTTPS.

I can reach both adresses (HTTP/HTTPS) in Internet Explorer. If I use URLDownloadToFile with the HTTP address the file is downloaded.

When using the HTTPSadress I get return code -2146697211. Maybe this a certificate Problem?

    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

    Dim Ret As Long

    Sub DownloadCode()
        Dim strURL As String
        Dim strPath As String
        strURL = "https:/url.de/module.bas"
        strPath = Environ("TEMP") & "\Module.bas"
        Ret = URLDownloadToFile(0, strURL, strPath, 0, 0)

        If Ret = 0 Then
    '        MsgBox "File successfully downloaded"
        Else
            MsgBox "Returncode:" & Ret & " Unable to download Code`enter code here`."
        End If
    End Sub

Answer 1

If anyboy else has this Problem: The Problem for me was, that the Server expected a Client Certificate. Normally https calls are no Problem from VB. For self signed certs, one has to send a certificate from file System or Windows cert store.

Dim oStream As Object
 Dim myURL As String

 myURL = "URL"

 Dim WinHttpReq As Object
 Set WinHttpReq = CreateObject("WinHttp.WinHttpRequest.5.1")
 WinHttpReq.Option(4) = 13056 ' Ignore SSL Errors

 WinHttpReq.Open "GET", myURL, False

 ' Grab Cert from Windows Cert Store
'WinHttpReq.SetClientCertificate "CURRENT_USER\Root\CERTI"

 WinHttpReq.setRequestHeader "Accept", "*/*"
 WinHttpReq.setRequestHeader "User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)"
 WinHttpReq.setRequestHeader "Proxy-Connection", "Keep-Alive"
 WinHttpReq.Send

 myURL = WinHttpReq.ResponseBody
 If WinHttpReq.Status = 200 Then
Set oStream = CreateObject("ADODB.Stream")
  oStream.Open
  oStream.Type = 1
  oStream.Write WinHttpReq.ResponseBody
  oStream.SaveToFile Environ("TEMP") & "\File", 2
  oStream.Close
  Else
        MsgBox "Returncode:" & WinHttpReq.Status & " Unable to download  Code."
 End If