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Setting a default value for a screen field

Learn how to set a default value based on the value on the previous field in this expert response from Matt Billingham.

I have to set a default value for a screen field. This default value should be based on the value entered by the user on the previous field. Can this be accomplished by a field exit? How this can be achieved?
You can read the value of another field in a field exit, using the FM DYNP_VALUES_READ. Alternatively, you could use IMPORT/EXPORT TO/FROM MEMORY ID.

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