Check to see if a printer supports PostScript.
printerSupportsPostScript([in] BSTR printerName, [out, retval] VARIANT_BOOL *sup)
This function returns true if the specified printer supports PostScript.

printerSupportsPostScript checks whether XpdfPrint will (by default) use its internal PostScript generation path for this printer. A few PostScript printer drivers are not supported by XpdfPrint – this function returns false in those cases.

When printerSupportsPostScript returns true, the forceGDI property can be used to force XpdfPrint to use its GDI printing path.

If pdf.printerSupportsPostScript(printerName) Then ... End If