How to mail using vb.net windows form

[somtabu]

actually i have used mail on vb.net windows forms

i have used this code for this
[code=vbnet]
Imports System.Net.Mail

'Inside the form’s code window:

Public Sub SendAnEmail(ByV al MsgFrom As String, ByVal MsgTo As String, ByVal MsgSubject As String, ByVal MsgBody As String)

Try

' Pass in the message information to a new MailMessage

Dim msg As New Net.Mail.MailMe ssage(MsgFrom, MsgTo, MsgSubject, MsgBody)



' Create an SmtpClient to send the e-mail

Dim mailClient As New SmtpClient("127 .0.0.1") ' = local machine IP Address

' Use the Windows credentials of the current User

mailClient.UseD efaultCredentia ls = True



' Pass the message to the mail server

mailClient.Send (msg)

' Optional user reassurance:

MessageBox.Show (String.Format( "Message Subject ' {0} ' successfully sent From {1} To {2}", MsgSubject, MsgFrom, MsgTo), "EMail", Windows.Forms.M essageBoxButton s.OK, Windows.Forms.M essageBoxIcon.I nformation)

' Housekeeping

msg.Dispose()

Catch ex As FormatException

MessageBox.Show (ex.Message & " :Format Exception")

Catch ex As SmtpException

MessageBox.Show (ex.Message & " :SMTP Exception")

End Try
End Sub[/code]

Then all that remains to do is create some calling code . This example uses a button click to send data that I type into four textboxes with self-explanatory names: (You can replace them with literal strings of your own)
[code=vbnet]

Private Sub Button1_Click(B yVal sender As System.Object, ByVal e As System.EventArg s) Handles Button1.Click

SendAnEmail(Fro mBox.Text, ToBox.Text, SubjectBox.Text , MsgBodyBox.Text )

End Sub[/code]
but it gives the error unable to find server 5.7.1 and mail sending is failed i

i have already configure iis and settings also smtp mail server but it can't work

when i have used on web application then it fine work so if you have any solution regarding this then plz help me

thanks in advance

[thenmozhivasanraj]

using System.Web.Mail ;

MailMessage mailobj = new MailMessage();
mailobj.To = "a@a.com";
mailobj.From = "x@x.com";
mailobj.Subject = "Hi this is the test mail";
mailobj.BodyFor mat = MailFormat.Html ;
string strBody = "hi this is the test mail;
mailobj.Body = strBody;
SmtpMail.Send(m ailobj);

use the above code to send mail in C#.