pdfSetPrintPaper
Set the paper size/type ID for printing.
void pdfSetPrintPaper(PDFViewerHandle viewer, unsigned int paperID)
This function sets the paper size/type ID for printing.
See pdfGetPrinterPaperID for more information on paper size IDs.
Note: Some printer drivers may require both the bin ID and paper ID to
be set, to compatible values (i.e., the requested bin must contain the
requested paper size) - see pdfSetPrintBin.
C:
unsigned int paperID;
....
paperID = pdfGetPrinterPaperID(....);
pdfSetPrintPaper(viewer, paperID);