c++使用windows的底层api接口来获取打印机的相关信息并设置纸张纸盒单页等信息

以下是使用Windows API接口获取打印机信息和设置纸张纸盒单页的示例代码：

获取打印机信息：

#include <Windows.h>
#include <Winspool.h>

void GetPrinterInfo(LPTSTR printerName)
{
    PRINTER_INFO_2* pPrinterInfo = NULL;
    DWORD dwNeeded = 0;
    DWORD dwReturned = 0;
    BOOL bSuccess = FALSE;

    // 获取打印机信息所需的缓冲区大小
    bSuccess = GetPrinter(printerName, 2, NULL, 0, &dwNeeded);
    if (!bSuccess && GetLastError() == ERROR_INSUFFICIENT_BUFFER)
    {
        pPrinterInfo = (PRINTER_INFO_2*)malloc(dwNeeded);
        // 获取打印机信息
        bSuccess = GetPrinter(printerName, 2, (LPBYTE)pPrinterInfo, dwNeeded, &dwReturned);
        if (bSuccess)
        {
            // 打印机名称
            _tprintf(_T("Printer Name: %s\n"), pPrinterInfo->pPrinterName);
            // 打印机驱动程序名称
            _tprintf(_T("Driver Name: %s\n"), pPrinterInfo->pDriverName);
            // 打印机端口名称
            _tprintf(_T("Port Name: %s\n"), pPrinterInfo->pPortName);
            // 打印机状态
            _tprintf(_T("Printer Status: %d\n"), pPrinterInfo->Status);
            // 打印机可用的纸张类型
            _tprintf(_T("Supported Paper Types: %s\n"), pPrinterInfo->pMediaTypes);
            // 打印机可用的纸张大小
            _tprintf(_T("Supported Paper Sizes: %s\n"), pPrinterInfo->pPaperSizes);
            // 打印机可用的纸张方向
            _tprintf(_T("Supported Paper Orientations: %s\n"), pPrinterInfo->pOrientations);
        }
        else
        {
            _tprintf(_T("GetPrinter failed, error code: %d\n"), GetLastError());
        }
        free(pPrinterInfo);
    }
    else
    {
        _tprintf(_T("GetPrinter failed, error code: %d\n"), GetLastError());
    }
}

设置纸张纸盒单页：

void SetPrinterPageSettings(LPTSTR printerName, LPTSTR paperName, LPTSTR binName, BOOL isSinglePage)
{
    PRINTER_DEFAULTS defaults = { NULL, NULL, PRINTER_ACCESS_ADMINISTER | PRINTER_ACCESS_USE };
    HANDLE hPrinter = NULL;
    BOOL bSuccess = FALSE;

    // 打开打印机
    bSuccess = OpenPrinter(printerName, &hPrinter, &defaults);
    if (bSuccess)
    {
        // 获取打印机设备模式
        DWORD dwNeeded = DocumentProperties(NULL, hPrinter, printerName, NULL, NULL, 0);
        DEVMODE* pDevMode = (DEVMODE*)malloc(dwNeeded);
        bSuccess = DocumentProperties(NULL, hPrinter, printerName, pDevMode, NULL, DM_OUT_BUFFER);
        if (bSuccess)
        {
            // 设置纸张名称
            _tcscpy_s(pDevMode->dmPaperSize, CCHDEVICENAME, paperName);
            // 设置纸张来源
            _tcscpy_s(pDevMode->dmDefaultSource, CCHDEVICENAME, binName);
            // 设置单页模式
            pDevMode->dmFields |= DM_SINGLESETPAPER;
            pDevMode->dmSingleSetPageExt.cx = pDevMode->dmPaperWidth;
            pDevMode->dmSingleSetPageExt.cy = pDevMode->dmPaperLength;

            // 设置打印机设备模式
            bSuccess = DocumentProperties(NULL, hPrinter, printerName, pDevMode, pDevMode, DM_IN_BUFFER | DM_OUT_BUFFER);
            if (bSuccess)
            {
                // 更新打印机设备模式
                bSuccess = SetPrinter(hPrinter, 2, (LPBYTE)pDevMode, 0);
                if (bSuccess)
                {
                    _tprintf(_T("SetPrinter successfully\n"));
                }
                else
                {
                    _tprintf(_T("SetPrinter failed, error code: %d\n"), GetLastError());
                }
            }
            else
            {
                _tprintf(_T("DocumentProperties failed, error code: %d\n"), GetLastError());
            }
        }
        else
        {
            _tprintf(_T("DocumentProperties failed, error code: %d\n"), GetLastError());
        }
        free(pDevMode);
        ClosePrinter(hPrinter);
    }
    else
    {
        _tprintf(_T("OpenPrinter failed, error code: %d\n"), GetLastError());
    }
}

需要注意的是，设置纸张纸盒单页需要管理员权限，并且设置后需要重启打印机才能生效。另外，纸张名称和来源需要根据打印机支持的纸张类型和纸张盒类型来设置。