[caki]

You must use define if pressed

PHP Code:

#define PRESSED(%0) \
    (((newkeys & (%0)) == (%0)) && ((oldkeys & (%0)) != (%0)))
then use where you want i suggest OnPlayerKeyStateChange
        if (PRESSED(KEY_NO))
    {
        //do something here
    } 


I hope you understand it now.