private void btnAccept_Click(object sender, EventArgs e)
        {
            //Authenticate user
            userAccount = ApplicationObjects.AuthenticateUser(this.txtUserID.Text, this.txtOldPwd.Text);

            if (userAccount == null || userAccount.HighestPermission == null)
            {
                DialogResult result = MessageBox.Show("Failed to authenticate user.", "Authentication failed!", MessageBoxButtons.RetryCancel, MessageBoxIcon.Hand);
                if (result == DialogResult.Retry)
                {
                    return;
                }
                else
                {
                    _loginForm.Logout();
                    this.Close();
                    return;
                }
            }

            //Verify the text boxes are not empty
            if (!(this.txtNewPwd.Text == String.Empty) && !(this.txtConfirmPwd.Text == String.Empty))
            {
                //Validate new and confirmed passwords match
                if (String.Compare(this.txtNewPwd.Text, this.txtConfirmPwd.Text) != 0)
                {
                    DialogResult result = MessageBox.Show("Your new and confirmed passwords did not match.", "Password mismatch", MessageBoxButtons.RetryCancel, MessageBoxIcon.Hand);
                    if (result == DialogResult.Retry)
                    {
                        return;
                    }
                    else
                    {
                        _loginForm.Logout();
                        this.Close();
                        return;
                    }
                }
            }
            else
            {
                DialogResult result = MessageBox.Show("Both new and confirmed password boxes must be populated.", "Invalid input!", MessageBoxButtons.RetryCancel, MessageBoxIcon.Hand);
                if (result == DialogResult.Retry)
                {
                    return;
                }
                else
                {
                    _loginForm.Logout();
                    this.Close();
                    return;
                }
            }

            //Change password
            userAccount.PasswordHash = this.txtNewPwd.Text;
            ApplicationObjects.ChangePassword(userAccount);

            //Logout to re-authenticate
            MessageBox.Show("Password change complete. Please re-log in.", "Success!", MessageBoxButtons.OK, MessageBoxIcon.None);
            _loginForm.Logout();
            this.Close();
        }