DWORD EnumPrinterData(
  HANDLE hPrinter,       // handle to printer
  DWORD dwIndex,         // index of value to retrieve
  LPTSTR pValueName,     // value name buffer
  DWORD cbValueName,     // size of value name buffer
  LPDWORD pcbValueName,  // bytes received
  LPDWORD pType,         // value type code
  LPBYTE pData,          // value data buffer
  DWORD cbData,          // size of value data buffer
  LPDWORD pcbData        // bytes received
);
 

 
DECLARE INTEGER EnumPrinterData IN winspool.drv;
    INTEGER   hPrinter,;
    INTEGER   dwIndex,;
    STRING  @ pValueName,;
    INTEGER   cbValueName,;
    INTEGER @ pcbValueName,;
    INTEGER @ pType,;
    STRING  @ pData,;
    INTEGER   cbData,;
    INTEGER @ pcbData