Cheat Engine

[4ng3licDew]

I just coded my own auto HP potion and auto MP potion for MapleStory using pixel detection, in Visual Studio C++ 6.

I bypass the GetPixel using the same method as for PostMessageA.

[lurc]

Amazing! Nice job
Only thing i'd say is to make the GUI a little more nicer looking, but hell, all that matters is functionality.

I did something similar, only differnce was that i checked for all the grey shades of the bar instead of looking for 10%-90%

[S3NSA]

Very nice job completing this.

May I ask when you started to learn C++?

[Symbol]

Make a text box for the user to enter %/amount of HP/MP and improve GUI, the rest is fine.

[4ng3licDew]

Thank you everyone for your feedbacks and encouragements.

[Anden100]

This is awesome! ill try to convert to delphi/pascal, just for fun

[angerist]

Once you've cleaned up the gui. And make it a bit more user friendly. I think it should come out really nice. Are you going to realese in MapleStory?

[tombana]

For GetPixel you need a handle to the window's device context. How did you obtain that? I tried GetDC (bypassed the same way) but that doesn't work.

[Wiccaan]

I don't play Maple, but good job. Some suggestions for you though when you do your window mode hook..

Firstly, do not use the new version of Detours. They took out the majority of the functions that are used to hook API. There are other methods of doing it with what they left in, but it is a lot more of a hassle and the old functions work fine. You can download a precompiled version of 1.5, by me, here:
http://home.comcast.net/~wiccaan/downloads/Detours.rar

I wrote a tutorial on how to do the hooking for DirectX 9.0 here which should also be some help for understanding the concept and functions:
http://www.extalia.com/forums/viewtopic.php?f=45&t=2578

Along with that, I also suggest you pay attention to the API used inside the game other then just DirectX. There are functions that can be called that will mess up your window mode hook while its running. Some things you should look out for will be:

- IsIconic
- SetWindowPos
- AdjustWindowRect/Ex
- GetWindowRect/SetWindowRect
- GetWindowLong

There are more API that can be used but these are the common ones I have encountered while making window mode hooks for games.

You should also look into CreateWindowExA/ExW to handle the startup size and position of the window if you want. You can also call API after the game is loaded to adjust the window yourself it you want, but I prefer doing it at startup.

Another thing to note is that inside your DirectX wrapper, anytime the game calls Reset on the device, your window mode will fuck up if you don't carry over the presentation params and reset them as well in the call. It's fairly easy to do it though. Post if you need help.

[Snootae]

my pixel-potter was a lot simpler, just checks a point specified by mouse, though your method is less precise, maybe less buggy, i made mine work with the mouse because my maple window is not full screen, and often not in the corner, and it lets people have more freedom

also

[4ng3licDew]

@tombana: To get the window's device context this is what I coded:

[tombana]

Thanks, I noticed my program crashed because of something else.

Another question, i'm trying to create a pot bot for flyff, but the hp bar is slightly transparant. I noticed the return value when the pixel is 'red' lies between 0x008080E0 and 0x009090F0 (i mean the lowest byte lies between E0 and F0, the 2nd byte between 80 and 90 etc.). How can I check if it lies in this range? Is there an api with some 'tolerance' option?
I'm coding in masm32 btw.

[Anden100]

[4ng3licDew]

@Snootae: I notice the HP bar and the MP bar is 100 pixels wide. So the smallest increment you can have is 1 pixel wide. I choose to have a step increment of 10 pixels (which is equivalent to 10%) because I did not need to go finer.

About the monitor color, thanks for picking out the error. Monitor is not the correct word. I was thinking of something like when you use the color correction in Display Properties (in control panel) to change the color, brightness, contrast, gamma etc... this could affect the value of GetPixel. I check this out and GetPixel still return the same value. The only think I notice is when I play in window mode using DXwnd, my ref_color is Red:82, Green:82 and Blue:82 but when I play in full screen my ref_color value is Red:82, Green:81 and Blue:82. I choose my default value for ref_color to be R82 G82 B82 because I play in windowed mode. Those who play in full screen have to change ref_color to R82 G81 B82. So the calibration feature is still useful.

------------------------
@wiccaan: Thank you for the information. I appreciate it.
------------------------

@tombana: When you asked about checking a color to see if it is in a certain range I immediately think of the Magic Wand Tool in photoshop. I try google to see it I can find anything. Here are some topics I found interesting:

1) How to implement a magic wand tool
http://www.losingfight.com/blog/2007/08/28/how-to-implement-a-magic-wand-tool/

2) Efficient companding algorithm suitable for color imaging
http://www.patentstorm.us/patents/6351555-description.html

3) Face Detection C++ Library with Skin and Motion Analysis
http://www.codeproject.com/KB/audio-video/face_detection.aspx

With MapleStory, the HP bar also have a shade of red. If I check to see if the pixel color is red and within certain tolerant level then this will make my code too complicated. I just check for the color grey at certain level, say at the 80% point, if the pixel color is not grey then I know the HP level is equal to or above 80%. And if the color is grey then I know the HP level is below 80%.

[Stylo]

this is great!!
but how could you get the pixels from the hp/mp bars rom MS window :s
i'm a little confused from your code cuz i'm not that good at c++ (learning =])