окончание печати - как узнать?

HANDLE hPrinter = NULL;
    DWORD dwSize = 25;
    char szBuffer[25];
    PRINTER_INFO_8* pi8 = NULL;
    PRINTER_INFO_2* pi2 = NULL;
    DOCINFO di = {0};

    di.cbSize = sizeof(DOCINFO);
    di.lpszDocName = "Bitmap Printing Test";

    GetDefaultPrinter(szBuffer, &dwSize);
    OpenPrinter    (szBuffer, &hPrinter, NULL);
   
    BOOL bRes = GetPrinter(hPrinter,8, NULL, 0, &dwSize);
    pi8 = (PRINTER_INFO_8*)new BYTE[dwSize];
    ZeroMemory(pi8, dwSize);
   
    bRes = GetPrinter(hPrinter,8, (LPBYTE)pi8, dwSize, &dwSize);
   
    HDC hDCPrint = CreateDC("WINSPOOL", szBuffer, NULL, pi8->pDevMode);
    StartDoc(hDCPrint, &di);
    StartPage(hDCPrint);
    TextOut(hDCPrint, 0, 0, "test text", 9);
    EndPage(hDCPrint);
    EndDoc(hDCPrint);
   
    DeleteDC(hDCPrint);
   
    GetPrinter(hPrinter, 2, NULL, 0, &dwSize);
    pi2 = (PRINTER_INFO_2*)new BYTE[dwSize];
    GetPrinter(hPrinter, 2, (LPBYTE)pi2, dwSize, &dwSize);
    if (pi2->cJobs)
        cout<<"printer is busy"<<endl;
    else
        cout<<"printer is free"<<endl;
    delete [](BYTE*)pi8;
    delete [](BYTE*)pi2;
    ClosePrinter(hPrinter);