The function key indicators, KA through KN and KP through KY are valid for a program that contains a display device WORKSTN file if the associated function key is specified in the DDS.
The function key indicators relate to the function keys as follows: function key indicator KA corresponds to function key 1, KB to function key 2 ... KX to function key 23, and KY to function key 24.
Function keys are specified in the DDS with the CFxx (command function) or CAxx (command attention) keyword. For example, the keyword CF01 allows function key 1 to be used. When you press function key 1, function key indicator KA is set on in the RPG program. If you specify the function key as CF01 (99), both function key indicator KA and indicator 99 are set on in the RPG program. If the work-station user presses a function key that is not specified in the DDS, the IBM i system informs the user that an incorrect key was pressed.
If the work-station user presses a specified function key, the associated function key indicator in the RPG program is set on when fields are extracted from the record (move fields logic) and all other function key indicators are set off. If a function key is not pressed, all function key indicators are set off at move fields time. The function key indicators are set off if the user presses the Enter key.