Exit to disable changes in IW32 - component items

Hi All,

I want to disable any changes to the existing items on component screen if the workflow for the order is not yet completed.

For example - If the user has created order with 2 items, and the workflow for the same has been triggered, then until that workflow is complete, these items should not be changed.

Also, I cannot disable the entire component screen in iw32 as the user can add items where item category = N (Non-stock item).

Kindly suggest which BADI/exit can be used in this scenario.

Thanks

Meenakshi