MFC中获取指定打印机的打印队列的方法

void CPrintListTestDlg::OnBnClickedButton1()

{

    GetDlgItem(IDC_TxtList)->SetWindowText(L"");

    HANDLE   PrnHandle;   

    UpdateData(TRUE);

    LPTSTR strPrinter = m_StrPrinterName.GetBuffer();//如果网络打印机,则格式为\\Xp-pcname\CanonLBP or \\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(buf),   

            &dwSize))   {   

                PRINTER_INFO_2*   pInfo;   

                pInfo   =   (PRINTER_INFO_2*)buf;   

                //pInfo->Status   就是打印机的状态，详细的代码可以   

                //参见winspool.h中以PRINTER_STATUS开头的宏定义   

                if(pInfo->Status==PRINTER_STATUS_PAUSED) 

                    ;

                    //cout<<"a"<<endl;

                else if(pInfo->Status==PRINTER_STATUS_PENDING_DELETION)   

                    ;

                    //cout<<"b"<<endl;  

                ///////////以上pInfo->Status代码试验不成功，哪位知道原因请告知，谢谢

                if (pInfo->Attributes&PRINTER_ATTRIBUTE_WORK_OFFLINE)//测试成功

                {

                    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"开始获取....");

                //    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"打印文档"+strindex+L"\t";

                    strtemp = strindex + strtemp;



                    AppendText(IDC_TxtList,strtemp);

                }

            }

            else

                AppendText(IDC_TxtList, L"无打印队列");

        

        }

        ClosePrinter(PrnHandle);

    }

    else

    {

        CString strError;

        strError.Format(L"%d",GetLastError());

        strError = L"打开出错" + strError;

        AfxMessageBox(L"打开出错!");

    }



}

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;

}

运行结果: