• 軟件試用期及試用次數控制

    時間:2022-07-13 23:42:46 計算機軟件 我要投稿
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    軟件試用期及試用次數控制

    下面的代碼簡單演示了各部分的處理過程:

    一、安裝時寫入加密數據:

     (這里的加密使用了控件)

    DES->GenerateKey(neowarton20030731);
     TDateTime *d=new TDateTime(Date());
     AnsiString times,date,filename;;
     char dir[256];

     times=0;
     date=DateTimeToStr(*d);

     times=DES->EncryptString(times);
     date=DES->EncryptString(date);
     //install=DES->EncryptString(date);
     AnsiString s=times+date;
     OutputDebugString(s.c_str());


     filename=\mysoft.ini;
     GetSystemDirectory(dir,sizeof(dir));
     filename=dir+filename;

    if(FileExists(filename))
     {
     Application->Terminate();  //if the ini file is alread exists exit;
     }
     else
     {
     TIniFile *ini=new TIniFile(filename);
     ini->WriteString(setup,times,times);
     ini->WriteString(setup,date,date);
     ini->WriteString(setup,install,date);

    ini;

    //write register

    TRegistry *reg=new TRegistry();
     reg->RootKey=HKEY_LOCAL_MACHINE;
     if(reg->KeyExists(\SOFTWARE\Microsoft\Windows\CurrentVersion\mysoft))
     Application->Terminate();//if the key exists,terminate
     reg->OpenKey(\SOFTWARE\Microsoft\Windows\CurrentVersion\mysoft,true);
     reg->WriteString(warning,dot modify these items!Otherwise,your system will not run!neowarton2003xian);
     reg->WriteString(times,times);
     reg->WriteString(date,date);
     reg->WriteString(install,date);
     reg->CloseKey();

    reg;
     }

    二、安裝時在install Shield中加入以下代碼:

     Lauchapp(SUPPORTDIR^test.exe,)  //test為上面代碼的exe文件
     其它代碼省略

    三、在應用程序起動時:

    bool rt;
     TForm1 *fm1=new TForm1(NULL);//試用版彈出的窗口,點擊試用返回判斷結果
     fm1->ShowModal();
     rt=fm1->try_time;//是否已經過期
      fm1;
     if(rt)
     {
     MessageBox(NULL,¥?3n?é??¥?′á¤v1L?A§A¤£ˉà|A¨?¥??óa?¥??A?Dáê?R¥?|?a??I http://www.xxxxx.com ,ˉ?2t¥D?÷o?μ?¨?¤?àe,MB_OK+MB_ICONINFORMATION);
     Application->Terminate();//??3?à3¥?μ{§?
     return 0;
     }

    四、用戶點擊試用按鈕,返回是否過期的bool值:

    //read the encrypted ini file in the system directory to read the time and date
     //if filenote exist,return false,if the time and date wrong return false;

    //read data and then time from the register,where the data is also encrypted

    char dir[256];
     AnsiString filename=\mysoft.ini;
     GetSystemDirectory(dir,sizeof(dir));

    //the ini fils is in the system directory
     filename=dir+filename;
     if(!FileExists(filename))
     {
     Application->MessageBox(§Aao¨t2?1?¥?3n¥ó?i|?¤F?Dak-×§??A¤w?g¤£ˉà|A¨?¥??I ,ˉ?2t¥D?÷¨?¤?àe,MB_ICONERROR);
     HWND H;
     H=FindWindow(NULL,DNAAlarm);
     ::SendMessage(H,WM_CLOSE,0,0);
     OutputDebugString(go here);
     this->try_time=true;
     Close();
     return;
     }

    TIniFile *ini=new TIniFile(filename);
     AnsiString times,datetime,installday;

    times=ini->ReadString(setup,times,);
     datetime=ini->ReadString(setup,date,);
     installday=ini->ReadString(setup,install,);
     getthepara();

    AnsiString tt=times_reg+|+datetime_reg+|+datetime_reg;
     AnsiString ttt=times+|+datetime+|+installday;

    if((times_reg!=times)||(datetime_reg!=datetime)||(installday!=datetime_reg))
     {

    this->try_time=true;
     }
     else  //------------------------------------
     {

    DES->GenerateKey(neowarton20030731);
     times=DES->DecryptString(times);
     datetime=DES->DecryptString(datetime);
     installday=DES->DecryptString(installday);

    times_reg=DES->DecryptString(times_reg);
     datetime_reg=DES->DecryptString(datetime_reg);
     installday_reg= DES->DecryptString(installday_reg);

    tt=times_reg+|+datetime_reg+|+datetime_reg;
     ttt=times+|+datetime+|+installday;
     //|r2?|ê?à′?|¨¤é′á
     int t=StrToInt(times);
     TDateTime *dt=new TDate(Date());

    TDateTime *s=new TDate(StrToDate(datetime));  TDateTime *install=new TDate(StrToDate(installday));

    int tmp=*dt-*s;  
     int tmp2=*dt-*install;
     //int tmp3=*s-*dt;

    if((tmp>=-1)&&(tmp<=90)&&(tmp2>=-1)&&(tmp2<=90)&&(t<150))
    {
     AnsiString times_tmp=DES->EncryptString(IntToStr(StrToInt(times)+1));
     AnsiString datetime_tmp=DES->EncryptString(DateTimeToStr(*dt));  
     ini->WriteString(setup,times,times_tmp);
     ini->WriteString(setup,date,datetime_tmp);
     putthepara(times_tmp,datetime_tmp);
     this->try_time=false;
     }
     else
     {
     //write wrong time;
     
     AnsiString times_tmp=DES->EncryptString(IntToStr(StrToInt(times)+200));
     AnsiString datetime_tmp=DES->EncryptString(DateTimeToStr(*dt+3000));  
     ini->WriteString(setup,times,times_tmp);
     ini->WriteString(setup,date,datetime_tmp);
     putthepara(times_tmp,datetime_tmp);
     this->try_time=true;
     }
     }

    ini;

    this->Close();

    五、ini文件:

    [setup]

    times=inAk6xcTevw=
    date=XOqvDla+r+2Xtl4ZM567cQ==
    install=kAP2X5LVcWaXtl4ZM567cQ==
    (數據已經加密)
    .....

    六、注表容INI文件容基本相同!

    上面的代碼只是初步的,如果你要使用,需要經過詳細的修改才對。由于是繁體版,部分注釋顯示為亂碼,我已經將注釋刪除了,里面的消息框里的字符串也是亂碼,可以改改就行!敬原!

    (注,本文只是推薦一種簡單的方法,以滿足在些朋友簡單的要求,代碼剛實現功能 ,存在很多問題,我才準備改改,有好的方法可以提出來。┯蠹姨崾竞玫姆椒。

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