VC++实现Win2000下直接读写磁盘扇区

HANDLE CreateFile( LPCTSTR lpFileName, 
DWORD dwDesiredAccess, 
DWORD dwShareMode, 
LPSECURITY_ATTRIBUTES lpSecurityAttributes, 
DWORD dwCreationDisposition, 
DWORD dwFlagsAndAttributes, 
HANDLE hTemplateFile );

DWORD SetFilePointer(HANDLE hFile, 
LONG lDistanceToMove, 
PLONG lpDistanceToMoveHigh,
DWORD dwMoveMethod);

BOOL CDirectAccessHDDlg::WriteSectors(BYTE bDrive, DWORD dwStartSector, 
  WORD wSectors, LPBYTE lpSectBuff) 
// 对磁盘扇区数据的写入
{
　if (bDrive == 0) return 0;
　char devName[] = "\\\\.\\A:";
　devName[4] ='A' + bDrive - 1;
　HANDLE hDev = CreateFile(devName, GENERIC_WRITE, FILE_SHARE_WRITE, NULL, 
    OPEN_EXISTING, 0, NULL);
　if (hDev == INVALID_HANDLE_VALUE) return 0;
　SetFilePointer(hDev, 512 * dwStartSector, 0, FILE_BEGIN);
　DWORD dwCB;
　BOOL bRet = WriteFile(hDev, lpSectBuff, 512 * wSectors, &dwCB, NULL);
　CloseHandle(hDev);
　return bRet;
}
BOOL CDirectAccessHDDlg::ReadSectors(BYTE bDrive, DWORD dwStartSector, 
  WORD wSectors, LPBYTE lpSectBuff)
// 对磁盘扇区数据的读取
{
　if (bDrive == 0) return 0;
　char devName[] = "\\\\.\\A:";
　devName[4] ='A' + bDrive - 1;
　HANDLE hDev = CreateFile(devName, GENERIC_READ, FILE_SHARE_WRITE, 
    NULL, OPEN_EXISTING, 0, NULL);
　if (hDev == INVALID_HANDLE_VALUE) return 0;
　SetFilePointer(hDev, 512 * dwStartSector, 0, FILE_BEGIN);
　DWORD dwCB;
　BOOL bRet = ReadFile(hDev, lpSectBuff, 512 * wSectors, &dwCB, NULL);
　CloseHandle(hDev);
　return bRet;
}

if (ReadSectors(uDiskID, m_uFrom, (UINT)dwSectorNum, bBuf) == FALSE) {
　MessageBox("所选磁盘分区不存在！", "错误", MB_OK | MB_IConERROR);
　return;
}

for (DWORD i = 0; i < dwSectorNum * 512; i++) {
　sprintf(cBuf, "%s%02X ", cBuf, bBuf[i]);
　if ((i % 512) == 511)
sprintf(cBuf, "%s\r\n第%d扇区\r\n", cBuf, (int)(i / 512) + m_uFrom);
　if ((i % 16) == 15)
sprintf(cBuf, "%s\r\n", cBuf);
　else if ((i % 16) == 7)
sprintf(cBuf, "%s- ", cBuf);
}

file.Open(fileDlg.GetPathName(), Cfile::modeCreate | Cfile::modeReadWrite);
……
if (ReadSectors(uDiskID, m_uFrom, (UINT)dwSectorNum, bBuf) == FALSE) {
　MessageBox("所选磁盘分区不存在！", "错误", MB_OK | MB_IConERROR);
　return;
}
file.Write(bBuf, dwSectorNum * 512);
file.Close();

file.Open(fileDlg.GetPathName(), Cfile::modeReadWrite);
DWORD dwSectorNum = file.GetLength();
if (dwSectorNum % 512 != 0) return;
　dwSectorNum /= 512;
　unsigned char* bBuf = new unsigned char[dwSectorNum * 512];
　file.Read(bBuf, dwSectorNum * 512);
　if (WriteSectors(uDiskID, m_uFrom, (UINT)dwSectorNum, bBuf) == FALSE) {
MessageBox("所选磁盘分区不存在！", "错误", MB_OK | MB_IConERROR);
return;
　}
　file.Close();
　delete[] bBuf;

unsigned char bBuf[512];
UINT i = 0;
BOOL bRet = TRUE;
while (m_bAllDisk){
　memset(bBuf, 0xFF, sizeof(bBuf));
　bRet = WriteSectors(uDiskID, i, 1, bBuf);
　memset(bBuf, 0, sizeof(bBuf));
　bRet = WriteSectors(uDiskID, i, 1, bBuf);
　if (bRet == FALSE){
if (i == 0)
　MessageBox("所选磁盘分区不存在！", "错误", MB_OK | MB_IConERROR);
else
　MessageBox("磁盘数据擦除完毕！", "错误", MB_OK | MB_IConERROR);
　return;
　}
　i++;
}