pdfPrintSetCopies
Set the number of copies.
void pdfPrintSetCopies(PDFHandle pdf, int n)
This function sets the number of copies to be printed.
This feature is not supported by all printer drivers.
pdfPrintResetParams
resets this to its default value, which is to
use the driver's default number of copies.
C:
pdfPrintSetCopies(pdf, 10);