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