HTML fill-in and submit form

In ASP.NET its easy...

Protected Sub btnSend_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSend.Click
        Dim Msg As System.Net.Mail.MailMessage = New System.Net.Mail.MailMessage()
        Dim MailObj As New System.Net.Mail.SmtpClient("smtp.mysite.co.uk")
        Msg.From = New System.Net.Mail.MailAddress("michael@mysite")
        Msg.To.Add(New System.Net.Mail.MailAddress("michael@mysite"))
        Msg.IsBodyHtml = "False"
        Msg.Body = tbxName.Text & " [" & tbxEmail.Text & "]" & Chr(13) & Chr(10) & tbxMessage.Text
        Msg.Subject = "Website Message"
        MailObj.Send(Msg)
End Sub

This is what I have in my contact page at my site, below. In php though, I wouldnt have a clue!