如何获取SD 卡的 Serail Number ?

这是我在网上找到的一段代码，但我的代码却读不出来？请高手指正我哪里写错了。

我的编译环境是 EVC 3.0 MFC



void CReadSdCardSnDlg::OnButton1()
{
CCeFileFind find;
CString strMId,strSdSn,strText;
if(find.FindFlashCard())
{
find.FindNextCard();
if(find.IsStorageCard())
{
strText.Format(TEXT(\"Stroage Card : %s\"),find.GetFilePath());
MessageBox(strText);
GetSDCardSerialNumber(find.GetFilePath(),strMId,strSdSn);
}
find.Close();
}

strText.Format(TEXT(\"ID: %s \\n SN: %s\"),strMId,strSdSn);
MessageBox(strText);
}


typedef struct _STORAGE_IDENTIFICATION
{
    DWORD    dwSize;
    DWORD    dwFlags;
    DWORD    dwManufactureIDOffest;
    DWORD    dwSerialNumOffset;
} STORAGE_IDENTIFICATION, *PSTORAGE_IDENTIFICATION;

#define IOCTL_STORAGE_BASE FILE_DEVICE_DFS
#ifndef IOCTL_DISK_GET_STORAGEID
#define IOCTL_DISK_GET_STORAGEID  CTL_CODE(IOCTL_STORAGE_BASE, 0x709, METHOD_BUFFERED, FILE_ANY_ACCESS)
#endif
BOOL CReadSdCardSnDlg::GetSDCardSerialNumber(CString strCardName,CString &strManufactureID, CString &strSerialNum)
{
BOOL    bRet         = FALSE;
HANDLE  hVolume      = NULL;
BYTE    *pbySerialNo = NULL;
BYTE    *pbyManuID   = NULL;
DWORD   dwBytesRet   = 0;
DWORD   dwReqSize    = 0;
PSTORAGE_IDENTIFICATION pStoreInfo = NULL;

strCardName += TEXT(\"\\\\Vol:\");
hVolume=CreateFile(strCardName,GENERIC_READ|GENERIC_WRITE,0,NULL,OPEN_EXISTING,0,NULL);
if (hVolume != NULL && hVolume != INVALID_HANDLE_VALUE)
{
pStoreInfo=(STORAGE_IDENTIFICATION *)GlobalAlloc(GMEM_ZEROINIT,sizeof(STORAGE_IDENTIFICATION));
pStoreInfo->dwSize = 0;
bRet = DeviceIoControl(hVolume,IOCTL_DISK_GET_STORAGEID,NULL,0,
(LPVOID)pStoreInfo,sizeof(STORAGE_IDENTIFICATION), &dwBytesRet,NULL);
dwReqSize = pStoreInfo->dwSize;
GlobalFree(pStoreInfo);

DWORD dwErr = GetLastError();
CString strTemp;
if( (FALSE != bRet) || (ERROR_INSUFFICIENT_BUFFER != dwErr))
{
strTemp.Format(TEXT(\"Err1, %d \\n %s\"),dwErr,gGetErrorMessage());
MessageBox(strTemp);
CloseHandle(hVolume);
return FALSE;
}

ASSERT(dwReqSize > 0);

pStoreInfo=(STORAGE_IDENTIFICATION *)GlobalAlloc(GMEM_ZEROINIT,dwReqSize);
pStoreInfo->dwSize = dwReqSize;

bRet = DeviceIoControl(hVolume,IOCTL_DISK_GET_STORAGEID,NULL,0,
(LPVOID)pStoreInfo,dwReqSize, &dwBytesRet,NULL);

if((FALSE == bRet) || (ERROR_INSUFFICIENT_BUFFER == GetLastError()) )
{
MessageBox(TEXT(\"ERR2\"));

GlobalFree(pStoreInfo);
CloseHandle(hVolume);
return FALSE;
}

pbySerialNo=(((BYTE *)pStoreInfo)+pStoreInfo->dwSerialNumOffset);
pbyManuID  =(((BYTE *)pStoreInfo)+pStoreInfo->dwManufactureIDOffest);
int i=0;
while (pbySerialNo!=0 && i<200 &&
i<(int)(dwBytesRet- pStoreInfo->dwSerialNumOffset))
{
i++;
}
pbySerialNo = \'\\0\';

i=0;
while(pbyManuID !=0 && i<200 &&
i<(int)(pStoreInfo->dwSerialNumOffset - pStoreInfo->dwManufactureIDOffest))
{
i++;
}
pbyManuID = \'\\0\';

strManufactureID = (char*)pbyManuID;
strSerialNum     = (char*)pbySerialNo;

GlobalFree(pStoreInfo);
CloseHandle(hVolume);
return TRUE;
}
return FALSE;
}