if (calcHandle != null) {
NspireVirtualKeyStroke key = (NspireVirtualKeyStroke) event;
byte[] keyBytesCode = key.getKeyCode();
if (keyBytesCode != null) {
ConnectionHandle ch = new ConnectionHandle();
status = NavNet.connect(calcHandle, 16450, ch);
if (status == 1) {
status = NavNet.write(ch, NspireVirtualKeyStroke.VIRTUAL_KEY_STROKE_EVENT_COMMAND, NspireVirtualKeyStroke.VIRTUAL_KEY_STROKE_EVENT_COMMAND.length);