How to control brightness with slider

i would like to know how can i make a slider on xcode control the brightness. where should i put the coding ? view controller.m or .h ?

The N95 should unlock the keypad automatically when you open the slider (or the lens protector for that matter). The sensor would appear to be working since the keypad is locked when you close the slider, so it's probably a software issue. I'd start by uninstalling ShutUp beta, which is installed according to your signature.
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