Number to Text1

namespace Number2Text1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string[] ones ={"One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten", "Eleven", "Twelve", "Thirteen", "Fourteen", "Fifteen", "Sixteen", "Seventeen", "Eighteen", "Nineteen" };
            string[] tens ={ "Ten", "Twenty", "Thirty", "Fourty", "Fifty", "Sixty", "Seventy", "Eighty", "Ninty" };
            string[] hundreds = { "One hundred", "Two hundred", "Three hundred", "Four hundred", "Five hundred", "Six hundred", "Seven hundred", "Eight hundred", "Nine hundred" };
            int Val, i;
            string Res = " ";
            Val = Convert.ToInt32(textBox1.Text);
            if (Val > 999 && Val < 10000)
            {
                i = Val / 1000;
                Res = ones[i-1] + " Thousand ";
                Val = Val % 1000;
            }
            if (Val > 99 && Val < 1000)
            {
                i = Val / 100;
                Res = Res + hundreds[i - 1];
                Val = Val % 100;
            }
            if (Val > 19 && Val < 100)
            {
                i = Val / 10;
                Res = Res + tens[i-1];
                Val = Val % 10;
            }
            if (Val > 0 && Val < 20)
            {
                Res = Res + ones[Val-1];
                textBox2.Text = Res;
            }
            textBox2.Text = Res;
        }

        private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (((e.KeyChar > 47 && e.KeyChar < 58)||(e.KeyChar ==8)) != true)
                e.Handled = true;
        }

      private void button3_Click(object sender, EventArgs e)
        {
            textBox1.Clear();
            textBox2.Clear();
            textBox1.Focus();
        }
    }
}