怎么获取打印机的状态?GetPrinter获取的状态总是4224

如何获取打印机的状态?GetPrinter获取的状态总是4224
在网上找资料说用OpenPrinter和GetPrinter这两个方法来获取打印机的状态
折腾了一阵子总算是能判断出打印机是否连接到电脑了
可是过了两天我什么都没改真的什么都没改获取的打印机状态居然就变成4224了
这不是坑爹吗?
代码贴出来希望各位高手能帮忙解答下...

C/C++ code


bool32 CXXXPrint::CheckPrinter( LPCTSTR pszPrinterName )
{
    DWORD dwNeeded=0; 
    PRINTER_INFO_6* pPrinterInfo= (PRINTER_INFO_6 *)malloc( 0 ); 

    if ( !::OpenPrinter( m_szPrinterName, &m_hPrinter, NULL ) )
    {
        return FALSE;
    }

    if( !::GetPrinter( m_hPrinter, 6, (LPBYTE)pPrinterInfo, 0, &dwNeeded) )
    {
        pPrinterInfo= (PRINTER_INFO_6 *)malloc( dwNeeded );
        ::GetPrinter( m_hPrinter, 6, (LPBYTE)pPrinterInfo, dwNeeded, &dwNeeded ); 
    }
    ::ClosePrinter(m_hPrinter); 

    if ( PRINTER_STATUS_NOT_AVAILABLE == pPrinterInfo->dwStatus )
    {
        free(pPrinterInfo);
        pPrinterInfo = NULL;
        return FALSE;
    }
    else
    {
        free(pPrinterInfo);
        pPrinterInfo = NULL;
        return TRUE;
    }
}

本来pPrinterInfo->dwStatus是等于PRINTER_STATUS_NOT_AVAILABLE的也就是16进制的1000
但是现在却变成了4224也就是1080
在winspool.h里面也没找到这个状态郁闷啊
下面是打印机的状态
#define PRINTER_STATUS_PAUSED 0x00000001
#define PRINTER_STATUS_ERROR 0x00000002
#define PRINTER_STATUS_PENDING_DELETION 0x00000004
#define PRINTER_STATUS_PAPER_JAM 0x00000008
#define PRINTER_STATUS_PAPER_OUT 0x00000010
#define PRINTER_STATUS_MANUAL_FEED 0x00000020
#define PRINTER_STATUS_PAPER_PROBLEM 0x00000040
#define PRINTER_STATUS_OFFLINE 0x00000080
#define PRINTER_STATUS_IO_ACTIVE 0x00000100
#define PRINTER_STATUS_BUSY 0x00000200
#define PRINTER_STATUS_PRINTING 0x00000400
#define PRINTER_STATUS_OUTPUT_BIN_FULL 0x00000800
#define PRINTER_STATUS_NOT_AVAILABLE 0x00001000
#define PRINTER_STATUS_WAITING 0x00002000
#define PRINTER_STATUS_PROCESSING 0x00004000
#define PRINTER_STATUS_INITIALIZING 0x00008000
#define PRINTER_STATUS_WARMING_UP 0x00010000
#define PRINTER_STATUS_TONER_LOW 0x00020000
#define PRINTER_STATUS_NO_TONER 0x00040000
#define PRINTER_STATUS_PAGE_PUNT 0x00080000
#define PRINTER_STATUS_USER_INTERVENTION 0x00100000
#define PRINTER_STATUS_OUT_OF_MEMORY 0x00200000
#define PRINTER_STATUS_DOOR_OPEN 0x00400000
#define PRINTER_STATUS_SERVER_UNKNOWN 0x00800000
#define PRINTER_STATUS_POWER_SAVE 0x01000000
#define PRINTER_STATUS_SERVER_OFFLINE 0x02000000
#define PRINTER_STATUS_DRIVER_UPDATE_NEEDED 0x04000000

------解决方案--------------------
#define PRINTER_STATUS_OFFLINE 0x00000080
#define PRINTER_STATUS_NOT_AVAILABLE 0x00001000

两个或一下，不就是1080了么
------解决方案--------------------
(PRINTER_STATUS_NOT_AVAILABLE | PRINTER_STATUS_OFFLINE) 0x00001080

怎么获取打印机的状态?GetPrinter获取的状态总是4224

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