Error - Could not access 'CDO.Message' object

Question

hello,
i am working on windows based application in C#.i want to send a mail on a button click but i m getting an error while executing the application. The error is  "Could not access 'CDO.Message' object"

my code on button click is as under

private void btnSndMail_Click(object sender, System.EventArgs e)

{

string strMailBody="Hello this is test";

MailMessage objMsg=new MailMessage();

objMsg.To=[email protected];

objMsg.From="[email protected]";

objMsg.BodyFormat=MailFormat.Text;

objMsg.Body=strMailBody;

SmtpMail.SmtpServer="localhost;

SmtpMail.Send(objMsg);

}

plz help .........