学步园

    ULARGE_INTEGER lpuse;
    ULARGE_INTEGER lptotal;
    ULARGE_INTEGER lpfree; 

//得到DiskName中指定的盘符的总空间、已用空间、剩余空间
    GetDiskFreeSpaceEx(DiskName,&lpuse,&lptotal,&lpfree); 
    CString str;
    str.Format("当前磁盘剩余空间：%4.4fGB/n",lpfree.QuadPart/1024.0/1024.0/1024.0);
    TRACE(str);

//如果当前盘的可用空间小于300M时就查找当前目录下的最早的那个文件夹进行删除操作
    if ((lpfree.QuadPart/1024.0/1024.0) < 300.0)
    {
        CString m_cstrFileList="";
        CFileFind tempFind;
        BOOL bFound = TRUE;

//得到当前目录    
        m_cstrFileList += mRecordPath + "//*";  
        bFound=tempFind.FindFile(m_cstrFileList);
        CString strTmp;
       
        while(bFound)
        {
            bFound = tempFind.FindNextFile();   //查找文件
            if(!tempFind.IsDots())
            {  
                if(tempFind.IsDirectory())
                {
                    strTmp = mRecordPath + "//";
                    strTmp += tempFind.GetFileName();             

 //得到找到的那个文件名
                    char Temp[MAX_PATH] = {0};
                    str.Format("删除：当前找到的最早的文件夹名：%s/n",strTmp);
                    TRACE(str);
                    theApp.OutFile << str << endl;
                    memcpy(Temp,strTmp,strTmp.GetLength());
                    if (Temp[0] != '/0')
                    {
                        SHFILEOPSTRUCT FileOp;  
                        FileOp.hwnd = NULL; 
                        FileOp.wFunc = FO_DELETE;
                        FileOp.pFrom = Temp;
                        FileOp.pTo = NULL;
                        FileOp.fFlags = FOF_NOCONFIRMATION;  
                        FileOp.lpszProgressTitle = FALSE;
                        FileOp.hNameMappings = NULL;   
                        FileOp.lpszProgressTitle = NULL;     

//删除
                         SHFileOperation(&FileOp);   
                    }
                    break;
                }
            }
        }
        tempFind.Close();
    }