key_press with text_changed

hello
here is the problem

i have a textbox and i want to use key_press event for it only when i press "Enter" key..
but i want to use text_changed event also. problem is that text_changed fire itself before key_press
i mean it takes "Enter " as a text_changed not as a key_press.
how can i resolve this problem

 private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
        {

            if (e.KeyChar == (char)Keys.Enter)
            {
                e.KeyChar = (char)Keys.Tab;
                SendKeys.Send(e.KeyChar.ToString());
            }
        }

 private void textBox1_TextChanged(object sender, EventArgs e)
        {
            AutoCompleteStringCollection srsa = new AutoCompleteStringCollection();
            foreach (DataRow drsa in ob.dsss2("select accountn from partymaster", "dss").Tables[0].Rows)
            {
                srsa.Add(drsa[0].ToString());
            }
            textBox1.AutoCompleteCustomSource = srsa;
}

i want to move the cursor to next control when hit "Enter" but its not moving while if i dont use text_changed then it works fine.

Tags: C#, Windows Forms