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      • 軟件試用期及試用次數(shù)控制

        時間:2022-07-13 23:42:46 計算機軟件 我要投稿
        • 相關(guān)推薦

        軟件試用期及試用次數(shù)控制

        下面的代碼簡單演示了各部分的處理過程:

        一、安裝時寫入加密數(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(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¨?¥??óa(chǎn)?¥??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(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。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單的方法,以滿足在些朋友簡單的要求,代碼剛實現(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ā

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