Microsoft office applications treat a drawing object as if it can be scaled up and scaled down indefinitely without impacting the fidelity. This assumption does not hold true in every real world scenario. After all, the barcode must be readable in most cases. If the barcode image is too small, it can not be picked up by a scanner.
When you scale the drawing under the Design Mode, Office programs automatically adjust the bounding rectangle and scale the drawing without notifying the Barcode ActiveX object. The property ZoomRatio still reports 1.0.
We recommend that you do not scale the drawing by enlarging the bounding tracker box. If you need to change the size, do so by modifying the object properties.