public void SetCursor(Bitmap cursor, Point hotPoint)

        {

            int hotX = hotPoint.X;

            int hotY = hotPoint.Y;

            Bitmap myNewCursor = new Bitmap(cursor.Width *  - hotX, cursor.Height *  - hotY);

            Graphics g = Graphics.FromImage(myNewCursor);

            g.Clear(Color.FromArgb(, , , ));

            g.DrawImage(cursor, cursor.Width - hotX, cursor.Height - hotY, cursor.Width,

            cursor.Height);

            this.Cursor = new Cursor(myNewCursor.GetHicon());

            g.Dispose();

            myNewCursor.Dispose();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

             //传入鼠标自定义位图

            Bitmap a = (Bitmap)Bitmap.FromFile("锤子.png");

           //调用函数

            SetCursor(a, new Point(, ));

        }