GetLength()
Int GetLength(int icode, int iauto)
Returns any required length for barcode data (eg. EAN requires 13 digits, or 12 if the 1 checkdigit is being calculated automatically).
where icode refers to the barcode type for which the required number of characters is desired, and iauto is 1 if dFont will also be calculating the check digit, or 0 if the checkdigit is being provided.
A return of 0 indicates that the barcode does not have a specific data length requirement.
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