EnumPrinters用法

看API描述，不怎么理解，还是在网上找到用法，记载一下：

   1: DWORD dwNeeded = 0, dwNum = 0;

   2: EnumPrinters(PRINTER_ENUM_LOCAL, NULL, 4, NULL, 0, &dwNeeded, &dwNum);

   3: BYTE* pBuffer = new BYTE[dwNeeded];

   4: EnumPrinters(PRINTER_ENUM_LOCAL, NULL, 4, pBuffer, dwNeeded, &dwNeeded, &dwNum);

   5: if(dwNum !=0 ) {

   6:     PRINTER_INFO_4* pPrnInfo = (PRINTER_INFO_4*) buffer;

   7:     for(int i=0; i<dwNum; i++) {

   8:         MessageBox(pPrnInfo->pPrinterName);

   9:         pPrnInfo++;

  10:     }

  11: }

  12: delete[] pBuffer;