// Place the following code into the
// #region Windows Form Designer generated code

this.txtEnter.KeyDown += new KeyEventHandler(txtEnter_KeyDown);


// Place the following function where ever the
// #region Windows Form Designer generated code
// is located or you can move it elsewhere if you like,
// but you will then need to make it public.

private void txtEnter_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
        {

            if (e.KeyCode == Keys.Enter)
            {
                // Your code here.
            }
        }