22.214.171.124.3 RpcWritePrinter (Opnum 19)
RpcWritePrinter sends data to the print server.
DWORD RpcWritePrinter( [in] PRINTER_HANDLE hPrinter, [in, size_is(cbBuf)] BYTE* pBuf, [in] DWORD cbBuf, [out] DWORD* pcWritten );
hPrinter: A handle to a printer object or port object that was opened by RpcAddPrinter (section 126.96.36.199.3), RpcAddPrinterEx (section 188.8.131.52.15), RpcOpenPrinter (section 184.108.40.206.2), or RpcOpenPrinterEx (section 220.127.116.11.14).
pBuf: A pointer to a buffer that contains the data to be written. This parameter can be NULL if the value of the cbBuf parameter is zero.
cbBuf: The number of bytes of data to be written.
pcWritten: A pointer to a value that receives the number of bytes of data that were written.
Return Values: This method MUST return zero (ERROR_SUCCESS) to indicate successful completion or a nonzero Windows error code to indicate failure [MS-ERREF].
Upon receiving this message, the server MUST validate parameters as follows:
Perform the validation steps that are specified in PRINTER_HANDLE Parameters, section 18.104.22.168.11. This method SHOULD assume that the handle to the printer or port object can be used without further access checks.
Verify that a job has been associated with hPrinter using RpcStartDocPrinter, and if that verification fails, return ERROR_SPL_NO_STARTDOC [MS-ERREF].
Verify that printing of the job has not been canceled, and if that verification fails, return ERROR_PRINT_CANCELLED [MS-ERREF].
If cbBuf is not zero, verify that pBuf is not NULL.
If parameter validation fails, the server MUST fail the operation immediately and return a nonzero error response to the client. Otherwise, the server MUST process the message and compose a response to the client as follows:
If the hPrinter parameter is a printer object handle, copy cbBuf bytes of data pointed to by pBuf to the job; depending on server policy and settings, the data is added to temporary storage of the job (for example, a spool file), or sent directly to the port.
If the hPrinter parameter is a port object handle, copy cbBuf bytes of data pointed to by pBuf directly to the port.
Write the number of bytes that were written to the variable that is pointed to by the pcWritten parameter.
Return the status of the operation.
If the operation is successful, the server MUST modify the job object to indicate the number of bytes written so far to that job.