thanks for answer!
yes, is it. But the problem is that the first key that i press when the bb is "obscured" is not consumed and bb use it.
I have my application in the top of stack when the "light turn off" and if i press the END char to "turn on the light", the system close the screen (as it must do if i don't intercept the event).
Is the only key that do it, the others doesn't do nothing (i think becouse i can intercept them)...
p.d. sorry for spanglish