SplSetDevice - Example Code

This sample code first gets a device name from the command line. It then prompts the user for a parameter number and a value associated with it.

#define INCL_BASE
#define INCL_DOSMEMMGR
#define INCL_SPL
#define INCL_SPLDOSPRINT
#define INCL_SPLERRORS
#include <os2.h>
#include <stdio.h>            /* for printf function */
#include <string.h>           /* for strlen function */
#include <stdlib.h>           /* for atoi function   */

INT main (argc, argv)
    INT argc;
    CHAR *argv[];
{
    CHAR   bufValue[2]={0};
    CHAR   bufInput[128]={0};
    ULONG  splerr  ;
    ULONG  cbBuf ;
    ULONG  ulParmNum ;
    USHORT usParm;
    PSZ    pszComputerName ;
    PSZ    pszPrintDeviceName ;
    PVOID  pBuf;

    if (argc != 2)
    {
       printf("Syntax:  sdset  DeviceName  \n");
       DosExit( EXIT_PROCESS , 0 ) ;
    }
    pszComputerName = (PSZ)NULL ;

    /* Set the print device name to the value from the command line. */
    pszPrintDeviceName = argv[1];

    /* Get the parameter and the value. Store them in buffers. */
    printf("Enter Parameter number to be modified\n");
    gets(&bufValue[0]);
    printf("Enter new parameter value \n");
    gets(&bufInput[0]);

    /* Convert the input parmnum  to a ULONG. */
    ulParmNum = atoi(&bufValue[0]);

    switch (ulParmNum)
    {
       case 10:
          /* Determine the size of the buffer. */
          cbBuf = sizeof(PUSHORT);

          /* Convert the input parameter to a USHORT. */
          usParm =(USHORT)atoi(&bufInput[0]);

          /* Point the buffer to the value. */
          pBuf = &usParm;
          break;
       case 3:
       case 7:
       case 8:
          /* Determine the size of the buffer. */
          cbBuf = strlen(&bufInput[0])+1;

          /* Point the buffer to the value. */
          pBuf = (PSZ)&bufInput;
          break;
       default:
          printf("Invalid number\n");
          DosExit( EXIT_PROCESS , 0 ) ;
          break;
    }

    /* Make the call. */
    splerr = SplSetDevice(pszComputerName,pszPrintDeviceName,3L,
                          pBuf,cbBuf,ulParmNum) ;

    /* Print out the result. */
    printf("SplSetDevice Err= %ld, Parameter= %d, cbBuf= %ld ,ulParmNum= %ld\n",
                          splerr, usParm, cbBuf, ulParmNum);

    DosExit( EXIT_PROCESS , 0 ) ;
    return (splerr);
}