如何从文本框继承并覆盖按键和上键事件

我想创建一个继承自System.Windows.Forms.TextBox的新类，并为我的控件分配keypress和keyup事件。

像这样:

    class CurrencyTextbox : TextBox
    {
        private void CurrencyTextbox_KeyPress(object sender, KeyPressEventArgs e)
        {
            char ch = e.KeyChar;
            if (!Char.IsDigit(ch) && ch != 8 && ch != 13)
            {
                e.Handled = true;
            }
        }
        private void CurrencyTextbox_KeyUp(object sender, KeyEventArgs e)
        {
            if (!string.IsNullOrEmpty(CurrencyTextbox.Text))
            {
                System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo("en-US");
                Int64 valueBefore = Int64.Parse(CurrencyTextbox.Text, System.Globalization.NumberStyles.AllowThousands);
                CurrencyTextbox.Text = String.Format(culture, "{0:N0}", valueBefore);
                CurrencyTextbox.Select(CurrencyTextbox.Text.Length, 0);
            }
        }
    }