pdfPrintSetPriority
Set the print job priority.
void pdfPrintSetPriority(PDFHandle pdf, int priority)
This function sets the print job priority. The lowest priority is 1,
and the highest priority is 99.
pdfPrintResetParams resets this to its default value, which is to
use the driver's default priority.
C:
pdfPrintSetPriority(pdf, 50);