Need to Disable field in Table maintenance generator

Hi Frds,
I have created a custom table .But i stuck at one point. In the TMG one field is User ID and next field is filled with Full name of this User ID(made it noneditable). To get user name i implement '01' event in TMG. and its working fine. But when i change the user ID in the row ramdamly the user name is not updated. its because Event not trigger.
Please help me by giving valuable suggestion either of two query.
1) When any row field value get change. Which TMG event trigger and capture the changed row
2) How can i make field disable once it get filled and saved.
Thanks
Imran

Hi,
     When you create any entry in TMG event get occurred is 05 and if you are changing any row content than you have to use 01. And if you want to disable fields ,double click on overview screen number which is you have given when you created TMG and than it opens flow logic of screen than click on Element List tab and uncheck the fields which you wants dsiable in input column as i am attaching screenshot have a look at it.
in this user ID is unchecked.
Regards,
Shahezad

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