Constructor used to pass in the mail before merging it.
[Visual Basic] Public Sub New( _ ByVal fromAddress As String, _ ByVal fromDisplayName As String, _ ByVal replyToAddress As String, _ ByVal toAddress As String, _ ByVal ccAddress As String, _ ByVal bccAddress As String, _ ByVal subject As String, _ ByVal body As String, _ ByVal isBodyHtml As Boolean, _ ByVal dataRow As DataRow _ )