取硬盘物理序列号

void ChangeByteOrder(LPSTR lpString, int nLen)
{
CHAR c;
// 63 63 72 75 6E 2E 63 6F 6D
    for(int i = 0; i < nLen; i += 2)
{
c = lpString[i];
lpString[i] = lpString[i+1];
lpString[i+1] = c;
}
}

//获取硬盘序列号
VOID GetDiskNum(HWND hWnd)
{
CHAR szDiskNum[40]={0};
SENDCMDINPARAMS scip = { 0 };
CHAR szBuffer[sizeof(SENDCMDOUTPARAMS) + IDENTIFY_BUFFER_SIZE] = { 0 };
DWORD dwBytesRet = 0;
HANDLE hDevice=INVALID_HANDLE_VALUE;

hDevice = CreateFileW(L"\\\\.\\PhysicalDrive0",GENERIC_READ | GENERIC_WRITE,FILE_SHARE_READ | FILE_SHARE_WRITE,NULL,OPEN_EXISTING,0,0);
if(hDevice == INVALID_HANDLE_VALUE)
{
return;
}

scip.cBufferSize = IDENTIFY_BUFFER_SIZE;
scip.irDriveRegs.bSectorCountReg = 1;
scip.irDriveRegs.bSectorNumberReg = 1;
scip.irDriveRegs.bDriveHeadReg = IDE_ATAPI_IDENTIFY;
scip.irDriveRegs.bCommandReg = IDE_ATA_IDENTIFY;

if(DeviceIoControl(hDevice,
DFP_RECEIVE_DRIVE_DATA,
&scip,
sizeof(SENDCMDINPARAMS) - 1,
szBuffer,
sizeof(szBuffer),
&dwBytesRet,
NULL))
{
PSENDCMDOUTPARAMS pOut = (PSENDCMDOUTPARAMS)szBuffer;
PIDSECTOR pIdSec = (PIDSECTOR)(pOut->bBuffer);
ChangeByteOrder(pIdSec->sSerialNumber, sizeof(pIdSec->sSerialNumber));
strncpy(szDiskNum, pIdSec->sSerialNumber, 20);    
}
SetDlgItemTextA(hWnd,IDC_STATIC_DISKNUM,szDiskNum);
return;
}