Is there some way to disable the key Ctrl s in WIP Materials transactions form?

Hi,

We are doing some form customization on the R12 WIP form: WIP Materials transactions.

I need to know if there is some way to disable the key Ctrl+S in this form and how?

I tried to commented the code in the form level trigger: Key-Commit and replace with Null;

But when I go to test it , it is not working.

Thanks for your great help in advance for this issue.:)

Regards,

Ronglin