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This command is used to assign functions to keys on the keyboard of video terminals. Moreover, you can change, activate and deactivate the assigned functions.
This is possible for the following keys:
PA1 to PA3,
PF1 to PF24
CLEAR
To each of these keys, you can assign one of the following functions:
a Natural system command,
a Natural terminal command,
a user-defined command.
Natural will execute the assigned command whenever you press the
corresponding key in command mode (NEXT prompt).
Notes:
KEY are totally independent of assignments made with
a SET KEY statement in
a program.
KEY.
This document covers the following topics:
If you enter only the command KEY (without
parameters), the Function-Key Assignments screen will be
displayed. On this screen, you can assign commands to the individual keys by
entering the command names in the input fields.
To assign a different command to a key, you overwrite the existing entry in the input field.
To delete a command assignment, you delete the entry in the input field or overwrite it with blanks.
You can also assign commands to individual keys by specifying them
directly with the KEY command. For example:
KEY PF1=CLEAR
If the assigned command contains blanks, it has to be enclosed in apostrophes. For example:
PF13='UPDATE OFF'
With the command KEY OFF/ON, you
deactivate/re-activate all function-key assignments:
| KEY OFF | If you the press a function key, Natural will return an appropriate message indicating that the key is not active. |
|---|---|
| KEY ON | Re-activates all function-key assignments that have previously
been deactivated with KEY OFF.
|
You can also activate/deactivate the keys by overwriting the entry
ON/OFF in the field Activate
Keys at the top right-hand corner of the Function-Key
Assignments screen.
Note:
The CLEAR key cannot be
activated/deactivated. Unless another function is assigned to it, it has the
same function as the terminal command %%. The command
KEY ON/OFF and the Activate
Keys field have no effect on the CLEAR key.
With the command KEY
key=OFF/ON, you deactivate/re-activate
the command assigned to a specific key.
| KEY key=OFF | Deactivates the command assigned to a specific
key. For example: KEY PF24=OFF |
|---|---|
| KEY key=ON |
Re-activates a previously deactivated command assignment. For example: KEY PF24=ON |
Note:
The command KEY CLR=ON/OFF is not
possible (see also note above).
