One routine for all textboxes on form

Dear Sir,

I am using following codes on EVERY textbox.

 private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
 {
 char ch = e.KeyChar;
 decimal x;
 if (ch == (char)Keys.Back)
 {
                e.Handled = false;
 }
 else if (!char.IsDigit(ch) && ch != '.' || !Decimal.TryParse(textBox1.Text + ch, out x))
 {
                e.Handled = true;
 }
 }
 private void textBox1_Leave(object sender, EventArgs e)
 {
 if (textBox1.Text == "")
 {
 MessageBox.Show("Please enter Num 1");
 return;
 }
 else
 {
                textBox1.Text = Convert.ToDecimal(textBox1.Text).ToString("#,##");
 }
 }

In this way I have to waste much time and form space.

Is there any other way to use a routine on InitilizeCompent to handle all textboxes?

Please help