RosettaCodeData/Task/HTTPS/Visual-Basic/https.vb

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Sub Main()
Dim HttpReq As WinHttp.WinHttpRequest
' in the "references" dialog of the IDE, check
' "Microsoft WinHTTP Services, version 5.1" (winhttp.dll)
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Const HTTPREQUEST_PROXYSETTING_PROXY As Long = 2
Const WINHTTP_FLAG_SECURE_PROTOCOL_TLS1 As Long = &H80&
Const WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_1 As Long = &H200&
Const WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_2 As Long = &H800&
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#Const USE_PROXY = 1
Set HttpReq = New WinHttp.WinHttpRequest
HttpReq.Open "GET", "https://groups.google.com/robots.txt"
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HttpReq.Option(WinHttpRequestOption_SecureProtocols) = WINHTTP_FLAG_SECURE_PROTOCOL_TLS1 Or _
WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_1 Or _
WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_2
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#If USE_PROXY Then
HttpReq.SetProxy HTTPREQUEST_PROXYSETTING_PROXY, "my_proxy:80"
#End If
HttpReq.SetTimeouts 1000, 1000, 1000, 1000
HttpReq.Send
Debug.Print HttpReq.ResponseText
End Sub