C# controlling mouse using arduino + sensor

So far, my program manage to receive values from my sensor and put it in variables. now i want to control mouse movement using that data. the variable consist x1 and y1 for mouse position, click which is 0 = none, 1 = left click, 2 = right click. I've tried to modified Johnny Lee wiiWhiteboard Source Code where removing any wii lib referance and set the input from those variable.. but didn't works. here's my code so far..

public void mouseMovement()
        {
            mut.WaitOne();

            if (spot !=0)
            {
                int x = x1;
                int y = y1;
                float warpedX = x;
                float warpedY = y;
                warper.warp(x, y, ref warpedX, ref warpedY);

                if (spot == 1)//mouse down
                {
                
                    if (cursorControl)
                    {
                        INPUT[] buffer = new INPUT[2];
                        buffer[0].type = INPUT_MOUSE;
                        buffer[0].mi.dx = (int)(warpedX *65535.0f/screenWidth);
                        buffer[0].mi.dy = (int)(warpedY * 65535.0f / screenHeight);
                        buffer[0].mi.mouseData = 0;
                        buffer[0].mi.dwFlags = MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_MOVE;
                        buffer[0].mi.time = 0;
                        buffer[0].mi.dwExtraInfo = (IntPtr)0;

                        SendInput(2, buffer, Marshal.SizeOf(buffer[0]));

                    }

i though this line will enough to move the pointer.. but no.. nothing happens. please help and sorry for bad english. thanks

Tags: C#, Forms, Mouse