Hi Razvan,

First, Struct.zip is Christof Lange's work, not mine. I'm sure that he'll be glad to know you find it useful.

I think that the problem, however is in the declarations. Below is how I'd declare the functions OpenPrinter and DocumentProperties:

DECLARE OpenPrinter IN Winspool.drv;
  STRING @pPrinterName,;
  INTEGER @phPrinter, STRING @pDefault
* I'd pass 0 to indicate a null pointer to pDefault, but that's just me
DECLARE INTEGER DocumentProperties IN Winspool.drv;
  INTEGER hWnd, INTEGER hPrinter,;
  STRING @pDeviceName, STRING @pDevModeOutput,;
  STRING @pDevModeInput, INTEGER fMode

I think that may be the source of your problem.