How to prevent a barcode from being deleted from a form?

[acm007]

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In this application I have two forms:

1) Where the employees needs to enter some information such as: Customer Name, Purchase Order number, etc.
2) Where they scan items.

I have already blocked all fields from the subform, however, I cannnot block the barcode filed as the cursor needs to be "blinking" in order for the employees to scan an item.

The problem that I have it that if the employee wants to delete the items which were already scanned, all he has to do is hit the backspace button (or delete button) and the whole line is deleted. I would like to prevent that from happening. I have thought of trying to block these two keyboard keys so they are disabled on the subform, however i am not sure that this is the best way to solve this issue. Does anyone have any suggestions?

[CJ_London]

What you can do is disable the control with conditional formatting once a value has been entered. The rule would be

Field Value is...Greater Than..."" and select the disabled option

This will grey it out

You can prevent the user from deleting the row by changing the form properties for allow deletions to No

[acm007]

Hi Ajax,

I am relatively new at access. I did the first step but was no able to find the "disable option". Nevertheless it worked, so thank you very much for your help! Screenshots below:



I did not have to do the second part "You can prevent the user from deleting the row by changing the form properties for allow deletions to No" but when I tried it caused other problems in the database.

[CJ_London]

the disable option is the one you have highlighted - looks like a letterbox