Custom Message for Scanning Wrong Item in Item Fulfillment

We are using a scanner to scan items for the item fulfillment process and when an item is scanned that is not on the sales order, an alert pops up that says 'No Match'. Then if you keep scanning nothing stops you from continuing. We would like to somehow stop the people scanning from continuing in case they miss that message. Is there a way to program the barcode scanner to make a different sound (using a honeywell usb scanner) and make an alert that comes after the default alert, one that stops the user from continuing?

I already have a client script deployed to the item fulfillment record to alert users that they have scanned too many or not enough items to fulfill the order. It doesn't look like the field changed function is being triggered when this 'No Match' alert pops up, even though normally when you scan an item it does trigger that function. The error must stop that function from being triggered. Does anyone know what trigger I could use for a custom message that would force the user to stop scanning and look at the screen?