private void CommandText_KeyPress(object sender, KeyPressEventArgs e) { if (e.KeyChar == 13) { if (CommandText.Text.IndexOf("tail") > -1) { this.Text = IP.Text + " - LogAnalysis - [" + CommandText.Text + "]"; } else { //this.Text = IP.Text + " - LogAnalysis "; } byte[] sb = System.Text.Encoding.Default.GetBytes(CommandText.Text + " \n"); reader._pf.Transmit(sb); addComboBoxList((ComboBox)sender, CommandText.Text); CommandText.SelectAll(); } if (e.KeyChar.Equals(Convert.ToChar(Keys.Cancel))) { this.Text = IP.Text + " - LogAnalysis "; reader._pf.Transmit(new byte[] { Convert.ToByte(Keys.Cancel) }); } }