[Source] How to BOT in C#

[Shoruun]

hi,

I saw several thread with autoit bots. And many people who choose autoit, because they had problems with c#.
So, i will show you some of my core source, which will allow you to make bots in C#.

First of all we need to know gamestates. This is done by pixel colors, to be patch safe. Due to Directx problems, you have to use WINDOW MODE in Diablo 3 to succesfully get the pixel color.
Just find your a pixel, which is always the same color at a gamestate. for example the background at login screen, the button at loginloading screen, or the monsters near the healthball ingame.
To read the pixel and check it just use following code:

static public Color GetColorAt(Point location)
        {
            
            using (Graphics gdest = Graphics.FromImage(screenPixel))
            {
                using (Graphics gsrc = Graphics.FromHwnd(IntPtr.Zero))
                {
                    IntPtr hSrcDC = gsrc.GetHdc();
                    IntPtr hDC = gdest.GetHdc();
                    int retval = BitBlt(hDC, 0, 0, 1, 1, hSrcDC, location.X, location.Y, (int)CopyPixelOperation.SourceCopy);
                    gdest.ReleaseHdc();
                    gsrc.ReleaseHdc();
                }
            }

            return screenPixel.GetPixel(0, 0);
        }

To get the right coords in the window, and always if you move d3 window, use a convert method to get right pixel coords:

[DllImport("user32.dll")]
        private static extern int GetWindowRect(IntPtr hwnd, out Rectangle rect);
        static private Point ConvertToScreenPixel(Point point)
        {
            Rectangle rect;

            GetWindowRect(D3MemReader.getInstance().getD3WinHandle(), out rect);

            Point ret = new Point();

            ret.X = rect.Location.X + point.X;
            ret.Y = rect.Location.Y + point.Y;

            return ret;
        }

And here is a sample check method of my bot:

static public bool isInGame()
        {
            Point pixel = ConvertToScreenPixel(new Point(125, 598));
            
            Color c = GetColorAt(pixel);
 
            return (c.Name == "ff5d574c");
        }

The next important point is how to make a click in d3? IMPORTANT thing here is the waittime, it reduces the chance of a ban =)

[DllImport("user32.dll")]
static extern void mouse_event(int dwFlags, int dx, int dy, int dwData, int dwExtraInfo);
static public int LeftClick(int x, int y, bool random_sleep = true, int lowest_sleep = 100, int highes_sleep = 200, bool chest_click = false)
        {
            int sleep = 0;
            if (random_sleep)
            {
                sleep = random.Next(lowest_sleep, highes_sleep);
                System.Threading.Thread.Sleep(sleep);
            }

            Point tmp = Cursor.Position;

            mouse_event((int)(MouseEventFlags.LEFTUP), 0, 0, 0, 0);
            Cursor.Position = ConvertToScreenPixel(new Point(x, y));
            if(chest_click)
                System.Threading.Thread.Sleep(50);
            mouse_event((int)(MouseEventFlags.LEFTDOWN), 0, 0, 0, 0);
            mouse_event((int)(MouseEventFlags.LEFTUP), 0, 0, 0, 0);


            Cursor.Position = tmp;

            return sleep;
        }

MAKE SURE YOU ALWAYS CALL THIS METHOD WITH RANDOM COORDS!

Tools.LeftClick(rnd.Next(278, 285), rnd.Next(230, 235), true, big_run_time_min, big_run_time_max, true);

Next important thing would be to press a key. Currently i only use this for reconnect, because u are able to do all other things with the mouse.

[DllImport("user32.dll")]
static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, UIntPtr dwExtraInfo);
static public int PressKey(Keys key, bool random_sleep = true, int lowest_sleep = 100, int highes_sleep = 200)
        {
            int sleep = 0;
            if (random_sleep)
            {
                sleep = random.Next(lowest_sleep, highes_sleep);
                System.Threading.Thread.Sleep(sleep);
            }

            const int KEYEVENTF_EXTENDEDKEY = 0x1;
            const int KEYEVENTF_KEYUP = 0x2;

            keybd_event((byte)key, 0x45, KEYEVENTF_EXTENDEDKEY, (UIntPtr)0);
            System.Threading.Thread.Sleep(random.Next(5, 10));
            keybd_event((byte)key, 0x45, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, (UIntPtr)0);

            return sleep;
        }

With this pieces of code your are already able to make a nice bot.
Hope it helps u a bit =)

-Shoruun

[hovsa]

nice, as a Webdeveloper myself i was using AutoIT because i didnt have the first clue on how to do these things in WinForms and not having access to all the luxuries of C# is driving me crazy, i just might do my first ever WinForms project now

[Shoruun]

you r welcome =)

[CreativeXtent]

Very nice +! rep

[Sychotix]

Eww... programming a bot with pixel detection. Regardless, I'm sure people will find this to be useful. +Rep.

[Arakkoa]

Eww... programming a bot with pixel detection. Regardless, I'm sure people will find this to be useful. +Rep.

Well, screen scraping reduces the chances of getting banned as there is no need to inject code, or read memory or anything of the sorts.

[kyllesdk]

GetWindowRect(D3MemReader.getInstance().getD3WinHandle(), out rect);

I det the error that D3MemReader dosen't exist in the current context.

What is the D3MemReader? Some code that you didn't include in this post?

[who knows]

nice, as a Webdeveloper myself i was using AutoIT because i didnt have the first clue on how to do these things in WinForms and not having access to all the luxuries of C# is driving me crazy, i just might do my first ever WinForms project now

I've written bots in Visual Basic of all things, why wouldn't c# in visual studio work? Haven't used the language myself yet, I've just heard that they're similar, C++ & VB combined = C#.

[hecccy]

i wish i knew how to code properly, C# is one of the only things i know but this is still too complex for me

[jockep]

GetWindowRect(D3MemReader.getInstance().getD3WinHandle(), out rect);

I det the error that D3MemReader dosen't exist in the current context.

What is the D3MemReader? Some code that you didn't include in this post?

It's using some custom function to read the handle of the Diablo 3 window. You could use this

[DllImport("user32.dll", SetLastError = true)]
static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

IntPtr hWnd = (IntPtr)FindWindow("Diablo III", null);

and replace D3MemReader.getInstance().getD3WinHandle() with hWnd

Didn't try it tho.

[Shoruun]

and the same without DllImport:

public IntPtr getD3WinHandle()
{
	Process[] processes = Process.GetProcessesByName("Diablo III");
	if (processes.Count() > 1)
		throw new Exception("Too many Processes named Diablo 3!");

	if (processes.Count() == 0)
		throw new Exception("Diablo 3 not found!");

	return processes[0].MainWindowHandle;
}

i am saving this in a singleton, so i only need to get it once.

[muskatnuss]

Wow this is very usefull! Thanks for that pieces of code!

I have only written one app in c# it was a simple maths program so far. well i know the basics here but i really do got stuck with this "BitBlt" i really dont get the point with this one ?!
What is it and where do iget it?
I have read about it everything i was able to find.

Maybe you Shoruun can help me out or anybody else who knows c# and its librarys

Cheers

[DozyJr]

Wow this is very usefull! Thanks for that pieces of code!

I have only written one app in c# it was a simple maths program so far. well i know the basics here but i really do got stuck with this "BitBlt" i really dont get the point with this one ?!
What is it and where do iget it?
I have read about it everything i was able to find.

Maybe you Shoruun can help me out or anybody else who knows c# and its librarys

Cheers

found this link: BitBlt : Windows API*«*Windows*«*C# / C Sharp

Just put this in your code:

[DllImportAttribute("gdi32.dll")]
        private static extern int BitBlt
        (
            IntPtr hdcDest,     // handle to destination DC (device context)
            int nXDest,         // x-coord of destination upper-left corner
            int nYDest,         // y-coord of destination upper-left corner
            int nWidth,         // width of destination rectangle
            int nHeight,        // height of destination rectangle
            IntPtr hdcSrc,      // handle to source DC
            int nXSrc,          // x-coordinate of source upper-left corner
            int nYSrc,          // y-coordinate of source upper-left corner
            System.Int32 dwRop  // raster operation code
        );

Thanks for this topic - really useful

cheers

[egangster]

hmmm, hello

This may sound a bit lame question but...how do you fill in the screenPixel variable? I'm guessing you should have a method to get a snapshot of the game window and pass it to the screenPixel variable as an Image ?