VC枚举打印机驱动（EnumPrinterDrivers DRIVER_INFO_1）

 1 DRIVER_INFO_1 *pLevel1 = NULL;
 2 DWORD dwNeeded = 0,
 3 dwReceived = 0,
 4 dwError = 0;
 5  int nRet = 0;
 6 
 7 nRet = EnumPrinterDrivers(NULL, // local machine
 8  NULL, // current environment
 9  1, // level 1, whatever that means
10  (LPBYTE) pLevel1,
11  0,
12  &dwNeeded,
13  &dwReceived);
14 
15  if (0 == nRet)
16 {
17 dwError = GetLastError();
18 
19 }
20 
21 pLevel1 = (DRIVER_INFO_1 *) calloc(1, dwNeeded);
22 
23 nRet = EnumPrinterDrivers(NULL, // local machine
24 NULL, // current environment
25 1, // level 1, whatever that means
26 (LPBYTE) pLevel1,
27 dwNeeded,
28 &dwNeeded,
29 &dwReceived);
30 
31 for (int nCount = 0; nCount < (int) dwReceived; nCount ++)
32 {
33 printf("Name: %s\r\n", pLevel1[nCount].pName);
34 }