How to limit the number of rows in the Custom Control box

Hi All,

In my Module pool screen I have a Custom Control box for providing some free text as input. Now, there is no limit in the number of rows allowed for this box.

But, the requirement is, it should have the maximum number of rows = 99. and each row should have maximum length = 60 characters.

User should not be allowed to enter more than 60 characters per row and more than 99 rows.

Could you please let me know how to do this..? Are there any methods available which controls the maximum number of rows and maximum length per row..?

Please help me in resolving the issue. Thanks in advance.

Thanks & Regards,

Paddu.