If you go to

1. the screen definition screen (Development > Script dictionary > Screens) function GESAMK,

2. on the general tab, block section

3. the Options field allow you to setup codes(eg KARID) to allow insertion, deletion etc. look up the codes using the selection option. 

4. remember to save and perform validations if you change anything.

The option can be controlled through code as well.

Thanks JJ_Sage, I am actually looking to block this though code. As I need to enable the delete for only certain people.

Thanks JJ_Sage, I am actually looking to block this though code. As I need to enable the delete for only certain people.

you can lookup "status" variable in the help manual.

when a user clicks delete, you can check validity according to your criteria and stop the deletion by using mkstat on NBLIG control subprog.

sample help manual below