Answer / gvkreddy

It is used to processing the screen after inputing the values.

Answer / rasheed

it is used to store the user interaction on the screen.

Answer / atul katiyar

ok_code is a system defined code it is not user defined.
it's max length can be 20 char field.

Answer / hariabap

The OK_CODE field stores the function code in your program.
It is always the last field in the field list of a screen.
You need to assign a name to this field in the Screen
Painter. Traditionally, this field is always called
"OK_CODE". However, you can call it anything you like. Once
you have assigned a name to the OK_CODE field, you need to
declare a field with the same name in your module poo

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