Clicker

#include "stdafx.h"
#include <windows.h>

bool KeyIsPressed(unsigned char k) {
    USHORT status = GetAsyncKeyState(k);
    return (((status & 0x8000) >> 15) == 1) || ((status & 1) == 1);
}

int WINAPI WinMain(HINSTANCE hInst, HINSTANCE P, LPSTR CMD, int nShowCmd) {

    HWND target = (HWND)0x0004068E;
    //  pt is for the mouse position, wrect is for the client information. The mouse coords to be sent to the window
    //      must be relative to the top-left corner of the client area, so I have to include that too.
    POINT pt;
    RECT wrect;

    while (true) {
        //  ctrl + esc to quit
        if (KeyIsPressed(VK_CONTROL) && KeyIsPressed(VK_ESCAPE)) {
            break;
        }

        //  ctrl + left alt to send messages every 5 milliseconds to the target window
        if (KeyIsPressed(VK_CONTROL) && KeyIsPressed(VK_LMENU)) {
            GetCursorPos(&pt);
            GetClientRect(target, &wrect);
            //  Final argument holds the mouse positions
            //PostMessage(target, WM_LBUTTONDOWN, MK_LBUTTON, (pt.x - wrect.left) & ((pt.y - wrect.top) << 16));
            //PostMessage(target, WM_LBUTTONUP, MK_LBUTTON, (pt.x - wrect.left) & ((pt.y - wrect.top) << 16));
            PostMessage(target, WM_LBUTTONDOWN, MK_LBUTTON, MAKELPARAM(pt.x - wrect.left, pt.y - wrect.top));
            PostMessage(target, WM_LBUTTONUP, MK_LBUTTON, MAKELPARAM(pt.x - wrect.left, pt.y - wrect.top));

            Sleep(1);
        }

    }

    return 0;

}