如何取得所有虚拟盘盘符？？？？最好有代码..

Question

遇到一个应用程序，能自动生成几个虚拟盘，如何取得这几个虚拟盘的盘符？？
BOOL CTestManagerApp::GetServiceCfg()
{
CString lstrLetters = m_cfg.GetValue(_T("@service"), _SERVICE_DriverLetters);
lstrLetters.MakeUpper();
m_strDriverLetters.Empty();
for (int i=0;i<lstrLetters.GetLength();i++)
{
if (lstrLetters[i]<=L'Z' && lstrLetters[i]>=L'A')
m_strDriverLetters+=lstrLetters[i];
}
//读取最小可用盘符
m_strMinDriverLetter = m_cfg.GetValue(_T("@service"), _SERVICE_MinDriveLetter);
m_strMinDriverLetter.Trim();
m_strMinDriverLetter.MakeUpper();

return TRUE;
}

Answer 1

BOOL GetDriveInfo(PARTITION_INFORMATION_EX * PARTITION_INFO)
{

BOOL bResult;                 // results flag
HANDLE hDevice;               // handle to the drive to be examined 
DWORD junk; hDevice = CreateFile("\\\\.\\c:",  // drive 
//hDevice = CreateFile("\\.\C:",
                    GENERIC_READ,                // read
    FILE_SHARE_READ| FILE_SHARE_WRITE, 
                    NULL,             // default security attributes
                    OPEN_EXISTING,    // disposition
                    FILE_ATTRIBUTE_NORMAL,                // file attributes
                    NULL);            // do not copy file attributes   if (hDevice == INVALID_HANDLE_VALUE) // cannot open the drive
  {
  cout<<"create fail!"<<endl;
    return (FALSE);
  }
  bResult = DeviceIoControl(hDevice,  // device to be queried
IOCTL_DISK_GET_PARTITION_INFO_EX,  // operation to perform
 NULL, 0, // no input buffer
 PARTITION_INFO, 
 sizeof(*PARTITION_INFO),     // output buffer
&junk,                 // # bytes returned
(LPOVERLAPPED)NULL);  // synchronous I/O
  CloseHandle(hDevice);
  return (bResult);
}代码比较乱，上面是获得一个已知盘符的相关信息的代码，里面的函数你查下msdn。
我当时是要获得盘符的文件类型。
至于怎么获得盘符，说说你是想根据什么条件来获得盘符？比如说根据一个已经存在的文件。

Answer 2

BOOL CMyHook::initHook(void)
{
/*
CStdioFile myFile;

try
{
if (myFile.Open(_T("d:\\Hooklog.txt"),CFile::modeWrite|CFile::shareDenyWrite|CFile::modeCreate))
{
myFile.SeekToBegin();
}
myFile.Close();
}
catch(...)
{
}
*/ WriteLog(_T("InitHook"));
CString str;
str.Format(_T("hModal=%d"),hModule);
CMyHook::WriteLog(str);
InitializeMadCHook();
//collecting hooks can improve the hook installation performance in win9x
CollectHooks();
HookAPI("Kernel32.dll", "CreateFileW",CMyHook::HookCreateFileWCallback,(PVOID*)&CreateFileWNext);
HookAPI("gdi32.dll", "StartDocW",CMyHook::HookStartDocWCallback,(PVOID*)&StartDocWNext);
HookAPI("Shell32.DLL", "SHFileOperationW",CMyHook::SHFileOperationWCallback,(PVOID*)&SHFileOperationWNextHook);
FlushHooks();
// 读取当前挂接的虚拟磁盘盘符
CString strPath;
CString strValue;
strPath.GetBuffer(MAX_PATH);
GetSystemDirectory((LPSTR)(LPCTSTR)strPath, MAX_PATH);
strPath.ReleaseBuffer();
strPath+=_T(DEF_SETTING_FILE);
strValue.GetBuffer(MAX_PATH);
GetPrivateProfileString(_T("@service"),_T("DriverLetters"), _T("-"),(LPSTR)(LPCTSTR)strValue,MAX_PATH,strPath);
strValue.ReleaseBuffer();
if (strValue[0] != '-')
{
//解析各个盘符
for(int i=0;i<strValue.GetLength();i++)
{
if ('A'<=strValue[i] && 'Z'>=strValue[i])
driverLetters.Add(CString(strValue[i]));
}
}
// 读取当前用户名
szUser.GetBuffer(MAX_PATH);
GetPrivateProfileString(_T("@service"),_T("user"), _T("-"),(LPSTR)(LPCTSTR)szUser,MAX_PATH,strPath);
szUser.ReleaseBuffer();
if (szUser[0] == '-')
szUser=_T("");
return TRUE;
}这个是初始化HOOK，之类的
BOOL CTestManagerApp::GetServiceCfg()
{
CString lstrLetters = m_cfg.GetValue(_T("@service"), _SERVICE_DriverLetters);
lstrLetters.MakeUpper();
m_strDriverLetters.Empty();
for (int i=0;i<lstrLetters.GetLength();i++)
{
if (lstrLetters[i]<=L'Z' && lstrLetters[i]>=L'A')
m_strDriverLetters+=lstrLetters[i];
}
//读取最小可用盘符
m_strMinDriverLetter = m_cfg.GetValue(_T("@service"), _SERVICE_MinDriveLetter);
m_strMinDriverLetter.Trim();
m_strMinDriverLetter.MakeUpper();

return TRUE;
}
取得虚拟盘配置信息。
HANDLE WINAPI CMyHook::HookCreateFileWCallback(
  LPCWSTR lpFileName,
  DWORD dwDesiredAccess,
  DWORD dwShareMode,
  LPSECURITY_ATTRIBUTES lpSecurityAttributes,
  DWORD dwCreationDisposition,
  DWORD dwFlagsAndAttributes,
  HANDLE hTemplateFile)
{  
BOOL bValid = TRUE;
CString strName;
CString strValue;
strName=lpFileName;
strName.MakeUpper();
strName.TrimRight();
if (strName.Find(_T(".DOC"))>0 || strName.Find(_T(".XLS"))>0 || strName.Find(_T(".PPT"))>0 || strName.Find(_T(".MPP"))>0 ||
 strName.Find(_T(".PDF"))>0 || strName.Find(_T(".BMP"))>0 )
{    
//strName=GetServiceCfg(strValue);
if ( (strName[0] == 'I' ||  strName[0] == 'J') && strName.GetLength()>5)
{ 
WriteLog(_T("CreateFile"));
WriteLog(strName);
bValid=isValid();
}
}
if(bValid)
return CreateFileWNext(lpFileName,dwDesiredAccess,dwShareMode,lpSecurityAttributes,dwCreationDisposition,dwFlagsAndAttributes,hTemplateFile);
else
return NULL;
}
我是要把if ( (strName[0] == 'I' || strName[0] == 'J') && strName.GetLength()>5) 用自动生成的盘符能够代替，应该怎么弄？