PrDrvrClose
PrDrvrClose Low-level printer driver close
#include <PrintTraps.h> Printing Manager
void PrDrvrClose( );
PrDrvrClose closes the printer driver, allowing its code and data to be
purged.
Returns: none

Notes: PrDrvrClose is functionally equivalent to:
CloseDriver( iPrDrvrRef );
The system equate iPrDrvrRef is defined as -3 in the PrintMgr.h header
file.
This low-level function is not used by most applications. However, since
the higher-level PrClose does not actually release the memory used by the
printer driver, you may wish to call this function after calling PrClose.