Barcode.MarginSize specifies the size of the light margins
Default value: 0 The light margin size in HIMETRIC units.
Allowed values: 0 to half the width of the barcode
Note that if bearer bars have been specified and the DL_FLAG_EXBEARERS flag has been set, then the bearer bars extend over the light margins. If the DL_FLAG_EXBEARERS flag has not been set then the bearers do not extend into the light margins.
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