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    1. 軟件試用期及試用次數(shù)控制

      時(shí)間:2022-07-13 23:42:46 計(jì)算機(jī)軟件 我要投稿
      • 相關(guān)推薦

      軟件試用期及試用次數(shù)控制

      下面的代碼簡(jiǎn)單演示了各部分的處理過程:

      一、安裝時(shí)寫入加密數(shù)據(jù):

       (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(shí)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(yīng)用程序起動(dòng)時(shí):

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

      四、用戶點(diǎn)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&uml;t2?1?¥?3n¥ó?i|?¤F?Dak-×§??A¤w?g¤£ˉà|A&uml;?¥??I ,ˉ?2t¥D?÷&uml;?¤?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′?|&uml;¤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(shù)據(jù)已經(jīng)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(jīng)過詳細(xì)的修改才對(duì)。由于是繁體版,部分注釋顯示為亂碼,我已經(jīng)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(jiǎn)單的方法,以滿足在些朋友簡(jiǎn)單的要求,代碼剛實(shí)現(xiàn)功能 ,存在很多問題,我才準(zhǔn)備改改,有好的方法可以提出來。┯蠹姨崾竞玫姆椒。

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