简单的鼠标移动窗体

 private void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            Point point = this.Location;
            switch (e.KeyData)
            {
                case Keys.Up:
                    point.Y -= 2;
                    break;
                case Keys.Down:
                    point.Y += 2;
                    break;
                case Keys.Right:
                    point.X += 2;
                    break;
                case Keys.Left:
                    point.X -= 2;
                    break;
                case Keys.Escape:
                    this.Close();
                    break;
                default: break;
            }
            this.Location = point;
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Form1 form1 = new Form1();
            form1.KeyPreview = true;
        }