const MOUSEEVENTF_MOVE = 0x0001;
const MOUSEEVENTF_LEFTDOWN = 0x0002;
const MOUSEEVENTF_LEFTUP = 0x0004;
const MOUSEEVENTF_RIGHTDOWN = 0x0008;
const MOUSEEVENTF_RIGHTUP = 0x0010;
const MOUSEEVENTF_MIDDLEDOWN = 0x0020;
const MOUSEEVENTF_MIDDLEUP = 0x0040;
const MOUSEEVENTF_WHEEL = 0x0800;
const MOUSEEVENTF_ABSOLUTE = 0x8000;