U盘直接读写(今天用到了)

#ifndef INVALID_SET_FILE_POINTER
#define INVALID_SET_FILE_POINTER (DWORD)-1
#endif

#define FILE_BEGIN           0
#define FILE_CURRENT         1
#define FILE_END             2

HANDLE m_hDisk = NULL;

bool Open(char *vol)
{
  char szDrive[10];
  sprintf(szDrive, "\\\\.\\%c:", vol[0]);
  //sprintf(szDrive, "\\\\.\\scsi1:");
  m_hDisk = ::CreateFile(
    szDrive, 
    GENERIC_READ | GENERIC_WRITE, 
    FILE_SHARE_READ | FILE_SHARE_WRITE, 
    NULL, 
    OPEN_EXISTING, 
    0, 
    NULL);
  DWORD dwError = ::GetLastError();
  return m_hDisk != INVALID_HANDLE_VALUE;
}

void Close()
{
  if (m_hDisk != INVALID_HANDLE_VALUE)
    ::CloseHandle(m_hDisk);
}

bool ReadSector (DWORD sector, char *Buffer, int sectorSize)
{
  DWORD read = 0;

  if (::SetFilePointer(m_hDisk, sector, NULL, FILE_BEGIN) == INVALID_SET_FILE_POINTER)
    return false;

  if (!::ReadFile(m_hDisk, Buffer, sectorSize, &read, NULL))
    return false;
  return true;
}

bool WriteSector(DWORD sector, char *Buffer, int sectorSize)
{
  DWORD wrote = 0;
  
  if (::SetFilePointer(m_hDisk, sector, NULL, FILE_BEGIN) == INVALID_SET_FILE_POINTER)
    return false;

  if (!::WriteFile(m_hDisk, Buffer, sectorSize, &wrote, NULL))
    return false;

  return true;
}