VC++ / Machine Code Reverse Engineering Project

We are looking for an experienced VC++ developer and low level binary programmer with proficient knowledge of CAD software to help us to rebuild a CAD software plugin for AutoCAD LT.

LT Toolkit is an enhancement tool for AutoCAD LT that allows to run LISP routines among other added functionalities.

More info: [url removed, login to view]

LT Toolkit requires Slingshot (another set of enhancement tools for AutoCAD LT), and both source codes are in VC++ and Visual Studio 2008.

Slingshot is the main component of the project. Slingshot launches AutoCAD LT and creates the custom menu in the AutoCAD User Interface. Plus, Slingshot is used as the license management tool.

Chucks of source code have been deliberately deleted, along with important files.

Source code also missing relevant header files (.h) and source files (.cpp)

The source code is also looking for objectARX 2004 and objectARX 2009.

None of both projects LT Toolkit or Toolkit are able to build properly, with a lots of errors and compiler warnings.

The main sequence of launching the project:

InitApp() is the starting function in the [url removed, login to view] file. It calls the initTheApp() function with further calls fixOpenCommand()

With this reference, please see below snippet of code in the [url removed, login to view] source file:

bool dSlingShotMain::fixOpenCommand()



if (!_isLT()) return true;

HMODULE hLib = GetModuleHandle(ACUIDLL);

if (!hLib) return false;

BYTE pNewValue[1]= { 0x01 };

PBYTE pAddress;

if (myApp->acadVersion() == 2007) {

pAddress = (PBYTE)hLib+0x0000C8F8;

} else if (myApp->acadVersion() == 2008) {

pAddress = (PBYTE)hLib+0x0000CBB8;

} else

return false;


return true;


Above bold line of code indicates the call for ‘modifyBytes’ method in the above function.

The former developer of the software has changed some binary code for some functions in this DLL file.

This modification is dependent on the versions of AutoCAD LT. This kind of modification of the internal binary code is observed in following places for some other DLL files.

getAroundDBXACS(), setIsAnObjectDBXModule(), setIsAnObjectDBXModule(), fixOpenCommand(), fixFullScreenVector(), fixAecUiBase45Craps(), fixupAecSystemTools47()

It is also observed that this version dependent modification is done for AutoCAD LT versions 2007 to 2010 in some places, whereas the code for some versions is missing in the remaining places, e.g. the above code has the modifications for 2007 and 2008 only.

The crucial code for the ‘modifyBytes’ function is also missing. Hence it is difficult to understand what is exactly happening in this function.

Important source files are, too: [url removed, login to view], [url removed, login to view], [url removed, login to view]

Crucial difficulty:

AutoCAD LT version wise changes to the memory address locations as we do not know internals of AutoCAD LT.

Find out the working of the ‘modifyBytes’ function where changes in DLL address takes place and it is missing from the code.

Evner: AutoCAD, C++ Programmering, Software Arkitektur, Visual Basic

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Om arbejdsgiveren:
( 1 bedømmelse ) Avalon, Australia

Projekt ID: #970425

9 freelancere byder i gennemsnit $5444 på dette job


I am programming with machine code since 1988, programming windows apps and drivers and kernel level from 1997. I can return the project compilable for you. Final bid will depend on approximately how many lines of code Flere

$10000 AUD in 60 dage
(6 bedømmelser)

Dear Sir it's our privilege to be incorporated with you. Let us a chance to prove you ourselves. thanking you.

$4000 AUD in 30 dage
(0 bedømmelser)

I have specialised skills in AutoCAD Customization using various APIs. I have worked on ObjectARX, RealDWG , Visual LIsp etc. I know that AutoCAD LT does not support programming , but some very intelligent people finds Flere

$4500 AUD in 45 dage
(0 bedømmelser)

i am a .net professional developed many projects in sql, oracle and created various type of crystal reports.

$5000 AUD in 60 dage
(0 bedømmelser)

Hi Sir, I have more then 4+ Years of experience in AutoCAD/IntelliCAD/ObjectARX development, in VC++/ObjectARX/DWGDIrect/. Please check PMB for more information. I think I can complete this work for you in 1 Flere

$3500 AUD in 30 dage
(0 bedømmelser)

Hi, i have 9 years of experience in c++. I worked on addins for proe, unigraphics, solid works, parasolid. I have good knowledge in assembly programming and debugging skills. I look forward to work on this.

$5000 AUD in 60 dage
(0 bedømmelser)

We can do that

$3000 AUD in 30 dage
(0 bedømmelser)

Please refer to PMB.

$4000 AUD in 30 dage
(0 bedømmelser)

Hi, I am interested, pls check my resume and www link to one of my products. May be it's easy just re-write this start-up code as add-ons DLL with AutoCAD API's. Any estimate about time / price can only be done after Flere

$10000 AUD in 60 dage
(0 bedømmelser)