Let your EXE check itself for VIRUS infection
As far as I know viruses modify the header of your complied EXE to jump to a different location to execute the virus. This means the header will change and your EXE file will (with some viruses) have the virus attached to the end of the EXE file. I've included a module you should use in your EXE file with a function it should call to check itself. The rest of the code as well as the module you have to include in your project will compile as an inoculate program to write the footer to your EXE file so the EXE file can check itself. (THIS SOFTWARE IS NOT FOR PROGRAMMERS THAT WRITE VIRUSES ;) PS: This program will not make your program protect itself but will let the user know when it's infected.
AI
Podsumowanie AI: This codebase represents a historical implementation of the logic described in the metadata. Our preservation engine analyzes the structure to provide context for modern developers.
Kod źródłowy
'Save the files as described above
'and compile your ENOCK.EXE program.
'All you have to do now is to include
'the ENOCK.BAS file in your project
'and add this code to the startup of
'your program .. :)
Dim lCalc As Long
'Get the current CheckSum value
lCalc = CreateLong(CalcCheckSum(""))
If lCalc > 0 Then
Select Case CheckENOCK("", lCalc)
Case 2 'File is ENOCKED and CheckSum was Checked
MsgBox "File is Authentic ....", 32
Case 0 'Some Error occured
'Some error occured and will be displayed by the function
Case -1 'File is NOT ENOCKED and didn't check Checksum
MsgBox "File is NOT ENOCKED and didn't check Checksum", 32
Case -2 'File is ENOCKED and CheckSum doesn't match
MsgBox "File is NOT Authentic, posible virus infection ", 16
End Select
End If
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<div align="left"><font size="4"><b>Old snake under modern Wind32 SDK</b></font>
<p><a href="mailto:support@brigsoft.com?subject=SnakeArticle">O. Reshta</a></p>
<p>This article would be useful for students that studing IT technology
and programming. <br>
This article for you if you want to know little more about</p>
</div>
<ul>
<li>
<div align="left"> Win32 SDK using,</div>
</li>
<li>
<div align="left"> Graphics and sounds output,</div>
</li>
<li>
<div align="left"> Dynamic process modeling,</div>
</li>
<li>
<div align="left"> Visual C++ and C++ using,</div>
</li>
<li>
<div align="left"> OOA / OOD principles.</div>
</li>
</ul>
<div align="left">
<p>The article is based on BSSnake cpp sources. You can find whole VC++
v6.0 project on the site <a href="http://www.brigsoft.com">http://www.brigsoft.com</a>.
The article includes exercises tasks.</p>
<p>Probably, themes of the article would be difficult for you if don't
know C++ language and never wrote programs under Windows using Microsoft
VC++.</p>
<p class="header"> Win SDK or MFC</p>
</div>
Usually we use MFC while programming enterprise - level projects. But it
is not a rule that we must to use it always. I think that you must prefer
SDK if
<ol>
<li>
<div align="left"> you don't use document/view architecture, splitting
windows, toolbars, serialization process;</div>
</li>
<li>
<div align="left"> you don't use other libraries that use MFC.</div>
</li>
</ol>
<div align="left">
<p>If you want to create a small utility program or a puzzle game then
using SDK would be much wise solution. Time that you spend to program
will be same, exe file will be much shorter, and program installation
process will be cleaner. While you distribute MFC-Based project you
must build it with static MFC libraries ore distribute project with
MFC dlls. There is no any warranty that your customer has dlls for your
program. Old MFC-Based programs must work with new MFC versions. They
must but don't do it always. Your customer will be very glad if after
installing your project some his old software products will begin hang
up.</p>
<p>Either you use SDK or don't you must know it good. A big part of MFC
is SDK interface only. The most MFC window functions are same as SDK.
Difference is very small. CWnd class stores window handle and you must
not use it as the first parameter of function. CDC class stores DC handle
and most of graphic objects are same as SDK functions. CRect is based
on RECT structure, etc. There are good container classes as CArray,
CList, CMap, CString in MFC. But you can easy change them by STL classes.
STL much shorter and is a part of C++ standard. It is multiplatform
library. There are some SDK functions that are absent in MFC and you
use them direct from your code. So, good Windows programmer must know
SDK. The best way to know something is a project creating. If you use
VC++ and never used clean SDK try to write some program and you would
see that you begin understand MFC solutions much better. To understand
how SDK project works you can look at BSSnake sources. They are short
enough. </p>
<p class="header"> Snake game</p>
<p> The game rules are very plane. Snake moves in the window with some
speed. You can turn it left/right. If the snake eats a mouse it grows.
If snake eats hedgehog, its body or window border it dies. The speed
of snake is growing. Your task is to live as long as it possible. Score
is a function of snake length. </p>
<p class="header"> BSSnake solutions</p>
<p>OOP model of this project is very simple. There are no such things
as inheritance, polymorphism, abstract classes and RTTI here. I didn't
want to write classic OOP program according all rules that I used in
the big projects. I was trying to make shot and clean program. If you
are beginner in C++ this code is for you! All main games classes are
placed in two files Game.h and Game.cpp. They are short enough for easy
understanding.<br>
Imagine yourself a beginner that makes this snake project. He will create
Snake class and put in it data that describe a snake. For example, some
snake units with (x,y) coordinates. Than he will create method Grow()
that will add new unit to snake. Then he will make method Move(), that
change all coordinates of all units. Then he will understand that the
array is bad solution for snake body storing because every addition
will recreate whole array and he will replace the array by list. Then
he will find that Snake.Draw() method that redraw all snake units is
working too slowly when number of units overload some dozens. At last
he will use DirectX to speed up graphic operations.<br>
I did not so. My snake is not owner of its body! Actually we must not
move all Snake. We can move and redraw only the tail and the head. Other
body units are not changed. So speed of our solution is not depends
from snake length. All information that I need to snake control is storing
in the game field cells. Snake object remembers only its head and tail
coordinates. While head is moving it writes moving direction to its
field cell so we have track to tail moving and tail always gets direction
that it needs from cell of game field.<br>
The game field is a matrix of Cells. A Cell stores direction and its
type and nothing more. Its pixel coordinates can be counted easy. Cell
also draw itself using bitmap drawing function BitBlt. Bitmap is static
member of Cell class and all cells share it. <br>
PlayBox class controls field objects and cells drawing. All process
is execute by CPlayBox::NextTimeStep(). This method is cold every time
step. It calls mice generator and snake moving.<br>
To stop the game I use try/catch/throw mechanism. There are three events
that must stop a game and they occur on the second level under situation
handle. It would be boring to use BOOL return type to process these
events.</p>
<p class="header"> System solutions</p>
<p> The project was creating by Visual Studio(V6.0) Win32 Application
wizard. My changes are very small. I use global object gEngine to encapsulate
all windows message and time tick execution. I always do so because
I don't like long switch constructions. <br>
For time tick generator I did not use WM_TIMER window message because
it has low priority. I replaced GetMessage() function, that was waiting
thread messages, by PeekMessage() that was not stopping the program.
So I created something as OnIdele() method of MFC application class.
You would be very surprised if will try testing your system resources.
The snake eats 100% of processor! Do not afraid. It is only joke of
Microsoft. The program has normal priority and all other process receive
their processor ticks. But other process is sleeping if have not any
to do. Opposite BSSnake executes its own timer.</p>
<p>WinMain Message loop looks so :</p>
<p> <code><font color="#0000FF">while (1) <br>
{<br>
if(!PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)){<br>
// OR: there are no any message. OnIdle;-)<br>
gEngine.TimerProc();<br>
continue;<br>
}</font></code></p>
<p><font color="#0000FF"><code> if (!TranslateAccelerator(msg.hwnd, hAccelTable,
&msg)) <br>
{<br>
TranslateMessage(&msg);<br>
DispatchMessage(&msg);<br>
}</code></font></p>
<p><font color="#0000FF"><code> if(msg.message == WM_QUIT){<br>
break;<br>
};<br>
}</code></font></p>
<p> Standard Win32 Application wizard generate a project that cannot use
ASSERT macros. I take this macros from MFC and make him working. It
stops later then it must stop but you can see and test the program stack
as you do it using MFC.</p>
<p>Insert this strings into stdafx.h and ASSERT macros begins to work
(but so-so)</p>
<p><code><font color="#0000FF">#include <crtdbg.h><br>
#define ASSERT _ASSERT</font></code></p>
<p class="header">Appendix - Exersices</p>
<p>Symbol (*) marks difficult tasks.<br>
<br>
<b> A</b>. (OOA/OOD exercise)</p>
</div>
<ol>
<li>Create OOA/OOD documents for this project.</li>
<li> Create class diagram of BSSnake project using Rational Rose ore other
case tools.</li>
</ol>
<div align="left">
<p><b> B</b>. (C++ exercises)</p>
</div>
<ol>
<li>Memory allocation. Make dynamic memory allocation of cells array using
operator new. Don't forget to destroy it while program is finished.</li>
<li>(*) Make CellBase abstract class and its children for every kind of
cell units. Store base class object pointers or references in the field
array. Use virtual function Draw() to draw every unit. Use dynamic_cast
operator to test what kind of cell is placed in front of snake.</li>
<li>(*) Create abstract class CVictim and its child CMouse and CHedgehog.
Try to use them instead CMouse class.</li>
<li> Make field class with static array of cells. Inherit it by all classes
that need. It is a good solution to remove global array of cells.</li>
<li> Every cell store cell type and direction as 32 bit integer. Use bit
fields for storing this information. It makes game field array much
shorter. How much?</li>
<li> There are a lot of inline functions in a project. Why we use inline
functions? Why many software firms forbid its programmers to use them?
Replace all inline functions by normal class member functions. Did it
make the snake slowly? Did project become cleaner and easier for modifications?
</li>
</ol>
<div align="left">
<p><b>C</b>. (Game improving exercises)</p>
</div>
<ol>
<li>Make options dialog. Make game field size and start speed as option.</li>
<li> Make screen center align of game window.</li>
<li> Make background as bitmap.</li>
<li> Make opening background. A background picture opens only in cells
where a snake was.</li>
<li> Include mid files player.</li>
<li> Store options in the Win register.</li>
<li> Make pause key.</li>
<li> Make some new victims.</li>
<li>(*) Make victims that can walking in the field.</li>
<li>(*) Make some concurrent snakes. Player controls one snake computer
controls other.</li>
<li> Smooth snake moving. This time snake jumps every step to next cell.
Make moving from pixel to pixel. </li>
</ol>
<div align="left">
<p><b>D</b>. (System programming exercises)</p>
</div>
<ol>
<li>
<div align="left"> Try find solution of timer tick that not use 100%
of processor.<br>
<br>
<br>
</div>
</li>
</ol>
<div align="center"><a href="mailto:support@brigsoft.com?subject=SnakeArticle">Contact
author </a><br>
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