>Thanks to all of u, i am trying to create a simple on screen keyboard where one of the commandbutton represents Enter key. i noticed that after the button is clicked, looks like it does not release and the cursor disappear. There is no other statement or command except "Keyboard {Enter}" in the click event. thanks

You may try

keyboard '{TAB}' plain && you can try Enter instead as well
NODEFAULT

in the Click event.