private void ReaderSettings_KeyDown(object sender, KeyEventArgs e) { if (e.KeyValue == 56) { isKey8Pressed = true; } if (e.KeyValue == 57) { isKey9Pressed = true; } if (isKey8Pressed && isKey9Pressed) { if (!txtEpc.Focused) { if (isSettingsChanged) { btnSave_Click(sender, e); } AdvancedReaderSettings advReaderSettings = new AdvancedReaderSettings(); advReaderSettings.Show(); isKey8Pressed = false; isKey9Pressed = false; } } }