How to obtain the print queue of a specified printer in MFC

Void cprintlisttestdlg: onbnclickedbutton1 () {getdlgitem (idc_txtlist)-> setwindowtext (L ""); handle prnhandle; updatedata (true); lptstr strprinter = Response (); // for a network printer, the format is \ XP-pcname \ canonlbor \ 192.168.1.x \ printername m_strprintername.releasebuffer (); If (openprinter (strprinter, & prnhandle, null )) {unsigned char Buf [8192]; DWORD dwsize; If (getprinter (prnhandle, 2, Buf, sizeof (Bu F), & dwsize) {printer_info_2 * pinfo; pinfo = (printer_info_2 *) BUF; // pinfo-> Status indicates the printer status. For detailed code, see winspool. if (pinfo-> Status = printer_status_paused); // cout <"A" <Endl; else if (pinfo-> Status = printer_status_pending_deletion); // cout <"B" <Endl; //////// the above pinfo-> Status Code test fails. Which one knows the reason? Thank you if (pinfo-> attributes & printer_attribute_work_offline) // test successful {afxmessagebox (L "offline");} else {afxmessagebox (L "online");} job_info_2 * pjobs; int cjobs; DWORD dwprinterstatus; If (! Getjobs (prnhandle, & pjobs, & cjobs, & dwprinterstatus) {/* cstring strprint = pjobs-> pprintername; cout <pjobs-> jobid <"\ n" <strprint <Endl; cout <pjobs-> pdocument <Endl; */closeprinter (prnhandle ); return;} else {// cstring strprint = pjobs-> pprintername; If (cjobs> 0) {appendtext (idc_txtlist, l "start to get .... "); // cout <pjobs-> jobid <" \ nprint: "<strprint <Endl; cstring strtemp, strindex; For (Int J = 0; j <cjobs; j ++) {strindex. format (L "% d", pjobs [J]. jobid); strtemp = pjobs [J]. pdocument; strindex = l "printed document" + strindex + L "\ t"; strtemp = strindex + strtemp; appendtext (idc_txtlist, strtemp);} else appendtext (idc_txtlist, L "no print queue");} closeprinter (prnhandle);} else {cstring strerror; strerror. format (L "% d", getlasterror (); strerror = l "Open error" + strerror; afxmessagebox (L "Open error! ");}}

BOOL CPrintListTestDlg::GetJobs(HANDLE hPrinter,        /* Handle to the printer. */                                 JOB_INFO_2 **ppJobInfo, /* Pointer to be filled.  */                                 int *pcJobs,            /* Count of jobs filled.  */                                 DWORD *pStatus)         /* Print Queue status.    */ {    DWORD               cByteNeeded,        nReturned,        cByteUsed;    JOB_INFO_2          *pJobStorage = NULL;    PRINTER_INFO_2       *pPrinterInfo = NULL;    /* Get the buffer size needed. */     if (!GetPrinter(hPrinter, 2, NULL, 0, &cByteNeeded))    {        if (GetLastError() != ERROR_INSUFFICIENT_BUFFER)            return FALSE;    }    pPrinterInfo = (PRINTER_INFO_2 *)malloc(cByteNeeded);    if (!(pPrinterInfo))        /* Failure to allocate memory. */         return FALSE;    /* Get the printer information. */     if (!GetPrinter(hPrinter,        2,        (LPBYTE)pPrinterInfo,///////////////////////////lpstr        cByteNeeded,        &cByteUsed))    {        /* Failure to access the printer. */         free(pPrinterInfo);        pPrinterInfo = NULL;        return FALSE;    }    /* Get job storage space. */     if (!EnumJobs(hPrinter,        0,        pPrinterInfo->cJobs,        2,        NULL,        0,        (LPDWORD)&cByteNeeded,        (LPDWORD)&nReturned))    {        if (GetLastError() != ERROR_INSUFFICIENT_BUFFER)        {            free(pPrinterInfo);            pPrinterInfo = NULL;            return FALSE;        }    }    pJobStorage = (JOB_INFO_2 *)malloc(cByteNeeded);    if (!pJobStorage)    {        /* Failure to allocate Job storage space. */         free(pPrinterInfo);        pPrinterInfo = NULL;        return FALSE;    }    ZeroMemory(pJobStorage, cByteNeeded);    /* Get the list of jobs. */     if (!EnumJobs(hPrinter,        0,        pPrinterInfo->cJobs,        2,        (LPBYTE)pJobStorage,        cByteNeeded,        (LPDWORD)&cByteUsed,        (LPDWORD)&nReturned))    {        free(pPrinterInfo);        free(pJobStorage);        pJobStorage = NULL;        pPrinterInfo = NULL;        return FALSE;    }    /*    *  Return the information.    */     *pcJobs = nReturned;    *pStatus = pPrinterInfo->Status;    *ppJobInfo = pJobStorage;    free(pPrinterInfo);    return TRUE;}

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