Press S to start and X to stop

Auto clicker

#include "Windows.h"
#include <iostream>
#include <thread>

using namespace std;

void WaitForKey(int vKey)
{
	while (!GetAsyncKeyState(vKey));
}

void LeftClick()
{
	INPUT Input;
	// left down 
	Input.type = INPUT_MOUSE;
	Input.mi.dwFlags = MOUSEEVENTF_LEFTDOWN;
	SendInput(1, &Input, sizeof(INPUT));

	// left up
	ZeroMemory(&Input, sizeof(INPUT));
	Input.type = INPUT_MOUSE;
	Input.mi.dwFlags = MOUSEEVENTF_LEFTUP;
	SendInput(1, &Input, sizeof(INPUT));
}


void Clicks(volatile bool& stop)
{
	while (!stop)
	{
		LeftClick();
		Sleep(10);
	}
}

int main()
{
	volatile bool stop;
	while (true)
	{
		stop = false;
		WaitForKey('S');
		cout << "Start" << endl;
		thread endTask([&stop] {
			WaitForKey('X');
			cout << "Stop" << endl;
			stop = true;
		});

		Clicks(stop);
		endTask.join();
	}
}