C# Windows Application

private void frmMain_Load(object sender, EventArgs e)
        {
            objFrmLogin = new frmLogin();
            DialogResult mResult = new DialogResult();
            do
            {
                mResult = objFrmLogin.ShowDialog(this);
            }(while mResult!=DialogResult.OK);
        }

private void btnLogin_Click(object sender, EventArgs e)
        {
            objUser.Username = this.txtUsername.Text;
            objUser.Password = this.txtPassword.Text;
            objDB.OpenDB();
            if (objUser.Verify() == true)
            {
                ((frmMain)(this.Owner)).lblCUserName.Text = objUser.Username;
                this.DialogResult = DialogResult.OK;
                this.Close();            
            }
            else
            {
                MessageBox.Show("Either UserName or Password is incorrect.", "Master Industrial Concerns", MessageBoxButtons.OK, MessageBoxIcon.Information);
                this.DialogResult = DialogResult.Cancel;
            }
        }