Imports System.Net.Mail
Public Class Form1

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

End Sub

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

Dim MyMailMessage As New MailMessage()
Try
MyMailMessage.From = New MailAddress("Your gmail account")
MyMailMessage.To.Add("Your second email")
MyMailMessage.Subject = TextBox1.Text
MyMailMessage.Body = TextBox2.Text
Dim SMTP As New SmtpClient("smtp.gmail.com")
SMTP.Port = 587
SMTP.EnableSsl = True
SMTP.Credentials = New System.Net.NetworkCredential("Gmail account", "Gmail password")
SMTP.Send(MyMailMessage)
TextBox2.Text = ""
Catch ex As Exception
End Try
End Sub
End Class