Here is a short example of logging in to a Domino server using Visual Basic .NET.
Dim postData As String
postData = "username=MyUserName&password=mysecretpassword1234"
Dim request As HttpWebRequest
Dim response As HttpWebResponse
request = CType(WebRequest.Create("http://server.com/names.nsf?Login"), HttpWebRequest)
request.ContentType = "application/x-www-form-urlencoded"
request.ContentLength = postData.Length
request.Method = "POST"
request.AllowAutoRedirect = False
Dim requestStream As Stream = request.GetRequestStream()
Dim postBytes As Byte() = Encoding.ASCII.GetBytes(postData)
requestStream.Write(postBytes, 0, postBytes.Length)
requestStream.Close()
response = CType(request.GetResponse(), HttpWebResponse)
Console.WriteLine(New StreamReader(response.GetResponseStream()).ReadToEnd())
Console.WriteLine("Headers:")
Console.WriteLine(response.Headers.ToString())