模拟鼠标发送点击
怎么样能模拟鼠标快速点击 

                    PostMessage(ip, WM_LBUTTONDOWN, 1, lparam);

                    Thread.Sleep(100);

                    PostMessage(ip, WM_LBUTTONUP, 1, lparam);

PostMessage中间不加Thread的话 会失常  有没有更快点击的办法
------解决方案--------------------
    [DllImport("User32.dll", EntryPoint = "SendMessage")]
        private static extern int SendMessage(
        IntPtr hWnd,
        int Msg,
        int wParam,
        int lParam
        );
        private void button1_Click(object sender, EventArgs e)
        {

            SendMessage((IntPtr)comboBox2.Handle, 0x0201, 0, 0);
            SendMessage((IntPtr)comboBox2.Handle, 0x0202, 0, 0);

        }

其中API参数的含义为：

        //按下鼠标左键
        public static int WM_LBUTTONDOWN = 0x0201;
        //释放鼠标左键
        public static int WM_LBUTTONUP = 0x0202;


这个中间不用延时，因为SendMessage是等待消息返回再执行下一个，而PostMessage不等待消息返回就执行下一个