Thread: [C++] How to make a simple bot

In this tutorial I will explain to you how to program a bot. I will not post enough of the source code for you to make a copy pasta bot.

First, you will need to include the windows.h header file.

 #include <windows.h> //This is what we need for the SendInput functions

int main()

{ 

     return 0;

} 

The first function we can use to simulate keystrokes or mouse functions is SendInput().

SendInput - Synthesizes keystrokes, mouse motions, and button clicks.

The SendInput function requires the use of the INPUT object.

INPUT - Used by SendInput to store information for synthesizing input events such as keystrokes, mouse movement, and mouse clicks.

. So let us declare an INPUT object and have it setup for a mouse click.

 INPUT Input;

Input.type = INPUT_MOUSE;

Input.mi.dwFlags = MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_MOVE;

Input.mi.dx = X * (65535.0f / (GetSystemMetrics(SM_CXSCREEN) -1));

Input.mi.dy = Y * (65535.0f / (GetSystemMetrics(SM_CYSCREEN) -1)); 

If you just put this code in and compile + debug it, nothing will happen because we did not pass this through SendInput yet. Before I explain how to use SendInput, I will explain what this code above means. Since we set the input type to INPUT_MOUSE, we fill in Input.mi.dwFlags with what we want the mouse to do. In this case, we want to move the mouse. That is why we used MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_MOVE.

MOUSEEVENTF_ABSOLUTE - Contains information about a simulated mouse event.

Next we filled in the X and Y position of where we want the mouse to land.

Now we can move on to SendInput.

 SendInput(true, &Input, sizeof(Input)); 

After this piece of code, you will notice the mouse does move. You should know where this goes.

Try to make the mouse click now. You should used MOUSEEVENTF_LEFTDOWN and MOUSEEVENTF_LEFTUP. You also need to call SendInput twice.

 INPUT Input;

Input.type = INPUT_MOUSE;

Input.mi.dwFlags = MOUSEEVENTF_LEFTDOWN;     //Clicks the mouse down.

SendInput(true, &Input, sizeof(Input));

Input.mi.dwFlags = MOUSEEVENTF_LEFTUP;       //Releases the mouse clock.

SendInput(true, &Input, sizeof(Input)); 

Here is a keystroke example with the keyboard input.

 INPUT Input;

Input.type = INPUT_KEYBOARD;

Input.ki.dwFlags = /* Figure it out yourself */

Input.ki.wVk = Virtual Key Codes; 

Virtual Key Codes Table
The hint here is that it is very similar to a mouse click but, you use this KEYEVENTF_EXTENDEDKEY and KEYEVENTF_KEYUP.

 Input.ki.wvK = 'A';

Input.ki.dwFlags = KEYEVENTF_EXTENDEDKEY;

SendInput(true, &Input, sizeof(Input));

Input.ki.dwFlags = KEYEVENTF_KEYUP;

SendInput(true, &Input, sizeof(Input)); 

Now you need to turn it on and off. The smart way to do this is create a thread and have it watch for the hotkeys and then create another thread to simulate those keystrokes. For this we need the CreateThread function.

 int main()

{

     DWORD dwHandleHotKeys;

     CreateThread(NULL, NULL, (LPTHREAD_START_ROUTINE)HandleHotKeys, NULL, NULL, &dwHandleHotKeys);

     //On Exit

     ExitThread(dwHandleHotKeys);

}

 

void HandleHotKeys()

{

     //Create a loop to look for hotkeys.

} 

Before I close off this tutorial, I should tell you that this is probably blocked by MANY anti-hacking applications. And for use the Sleep() function for delays between keystrokes.

Author: ?(^_^?)(?^_^)?

Originally Posted by sh1ft

should i start learn from c language or assembly first

It's depended on your aim... if you have free time, if you already know what programming is, you can try ASM. No matter what you choose, just learn and improve your skills