ALV Grid Output - F4 Help

Hi,

I have a ALV Grid output with one editable field.

For the field, I want to assign a User defined F4 Help.

Iam not using CLASSES in my ALV report. How can I add F4 Help?

I know that I can do this with Classes, but in my report I am not using Classes .

Please guide me.

Thanks,

Shivaa.........