Cheat Engine

vegito616 · Posted: Sat May 05, 2007 4:06 am Post subject:

Ok, so everything went well, but I have one problem now, Wherever I set the coordinates for getPixel, it returns the same value. Is there a reason for this? My Key-sending is working perfectly but the getPixel is not. Would this happen if Hackshield were to hook getPixel? Is there a work-around if this were the case?

the_undead · Posted: Sat May 05, 2007 4:10 am Post subject:

I am not psychic. Nor is anyone else here, post source and I can help. Then we can see if its a programming error or an idiot error.

compactwater · Posted: Sat May 05, 2007 5:20 am Post subject:

Make a dummy process named "myGame.exe" and try that, if it works it's the Game's protection.

vegito616 · Posted: Sun May 06, 2007 6:08 am Post subject:

Yep, I think the game is hooking getPixel. I made a dummy .exe and searched for pixels and got a different result. Here is my source code for anyone that can find a fault I made:

Lolz

the_undead · Posted: Sun May 06, 2007 7:32 am Post subject:

Actually, if you used msdn you would know that it does not look for the color black.

the colorref value is a dword in the form of 0x00RRGGBB

so change it to look for the color 0x00000000 for black and 0x00FFFFFF for white.

vegito616 · Posted: Mon May 07, 2007 8:30 am Post subject:

But what I'm saying is that it returns the same value no matter what I set the coordinates as. Thanks for the heads up on the return value.

Uzeil · Moderator Reputation: 6 Joined: 21 Oct 2006 Posts: 2411

If you're trying this on say MapleStory, it isn't going to work.

If you're trying to see if you're able to code this, then try it without having GG at all yet on your current session.

If it straight out isn't working, you probably have the incorrect HDC.

I haven't gone far into the C languages and I'm not going to show you my code in it because my syntax mistakes may completely rape your outlook, but I'll check this out in a moment.

vegito616 · Posted: Mon May 07, 2007 4:00 pm Post subject:

Uzeil It works on other applications, so that isn't a problem. I think HackShield might be hooking it. How am I to check for getPixel hooking?

opcode0x90 · Cheater Reputation: 0 Joined: 05 Aug 2006 Posts: 27

RkUnhooker

linden · Posted: Mon May 07, 2007 11:00 pm Post subject:

Don't know about recent version of FuckShield, but when I was working with it back then, all the following usermode functions were hooked by an injected DLL named "EGRNAP.DLL". The injection was done using madCodeHook.

*Kernel32.dll
LoadLibraryExW

*USER32.dll
BeginPaint
EnableWindow
GetDC
GetDCEx
GetWindowDC
MoveWindow
SendInput
SendMessageA
SendMessageW
SetCaretPos
SetCursorPos
SetWindowsHookA
SetWindowsHookExA
SetWindowsHookExW
SetWindowsHookW
ShowWindow
keybd_event
mouse_event

*GDI32.dll
BitBlt
GetPixel

So, other than GetPixel, you have to find a way to circumvent GetDC, GetDCEx, or GetWindowDC hooks.
Look at the first few bytes of the function of your interest, if the first byte is 0xE9, or the first 2bytes are 0xFF and 0x25, that function is hooked.

thenewguy · Posted: Fri Jun 15, 2007 8:16 am Post subject:

Some information I found online as far as alternatives to getpixel. I haven't had a lot of time to review the information but there are some concepts I think are worth looking into

http://www.allegro.cc/manual/api/drawing-primitives/getpixel

http://www.codeguru.com/Cpp/G-M/bitmap/specialeffects/article.php/c1743

http://www.kaffe.org/pipermail/kaffe/2005-July/102824.html

http://public.kitware.com/pipermail/insight-users/2003-February/002511.html

http://www.codeproject.com/bitmap/ColorCursorFromBmp.asp?df=100&forumid=24865&exp=0&select=1587671