Reading Unformatted Data

HANDLE drive = CreateFile(_T("\.PhysicalDrive0"), GENERIC_READ, FILE_SHARE_WRITE, 0, OPEN_EXISTING, 0, 0);
// error handling
DWORD br = 0;
DISK_GEOMETRY dg;
DeviceIOControl(drive, IOCTL_DISK_GET_DRIVE_GEOMETRY, 0, 0, &dg, sizeof(dg), &br, 0);
//
LARGE_INTEGER pos;
pos.QuadPart = static_cast<LONGLONG>(sectorToRead) * dg.BytesPerSector;
SetFilePointerEx(drive, pos, 0, FILE_BEGIN);
const bool success = ReadFile(drive, sectorData, dg.BytesPerSector, &br) && br == dg.BytesPerSector;
//
CloseHandle(drive);

DRIVE_LAYOUT_INFORMATION_EX dl;
DeviceIOControl(drive, IOCTL_DISK_GET_DRIVE_LAYOUT_EX, 0, 0, &dl, sizeof(dl), &br, 0);
if(dl.PartitionStyle == PARTITION_STYLE_RAW)
{
  // found correct disk
}