The PRINTER_HANDLE serves as an RPC context handle for
methods that specify a printer object handle parameter. RPC context handles are
specified in [C706]
sections 2 and 6.
This type is declared as follows:
typedef [context_handle] void* PRINTER_HANDLE;
The PRINTER_HANDLE context handle is returned by RpcAddPrinter, RpcAddPrinterEx, RpcOpenPrinter, and RpcOpenPrinterEx.