while (true)
{
	if (GetKeyState(0x01) == 0 || (GetKeyState(0x01) == 1))
	{
		HWND hWnd = FindWindowA(0, "Window"); //Getting HWND to game
		PostMessage(hWnd, WM_LBUTTONDOWN, 0, MAKELPARAM(btn.x, btn.y)); //LButton Down
		PostMessage(hWnd, WM_LBUTTONUP, 0, MAKELPARAM(btn.x, btn.y)); //LButton Up
	}
}