窗体吸附 Timer + 判断Location （简单实用）

//实现接近屏幕窗体边源吸附
        private void timer1_Tick(object sender, EventArgs e)
        {
            
            if (this.WindowState != System.Windows.Forms.FormWindowState.Minimized)
            {
                if (Cursor.Position.X > this.Left && Cursor.Position.X < this.Right && Cursor.Position.Y > this.Top && Cursor.Position.Y < this.Bottom)
                {
                    if (this.Top < 0)
                    {
                        this.Top = -5;
                        this.Show();
                    }
                    else if (this.Left < 0)
                    {
                        this.Left = -5;
                        this.Show();
                    }
                    else if (this.Left + this.Width >= Screen.PrimaryScreen.WorkingArea.Width)
                    {
                        this.Left = Screen.PrimaryScreen.WorkingArea.Width - this.Width + 5;
                        this.Show();
                    }
                }
                else
                {
                    if (this.Top <= 4)
                    {
                        this.Top = 5 - this.Height;
                        if (this.Left <= 4)
                        {
                            this.Left = -5;
                        }
                        else if (this.Left + this.Width >= Screen.PrimaryScreen.WorkingArea.Width - 4)
                        {
                            this.Left = Screen.PrimaryScreen.WorkingArea.Width - this.Width + 5;
                        }
                    }
                    else if (this.Left <= 4)
                    {
                        this.Left = 5 - this.Width;
                    }
                    else if (this.Left + this.Width >= Screen.PrimaryScreen.WorkingArea.Width - 4)
                    {
                        this.Left = Screen.PrimaryScreen.WorkingArea.Width - 5;
                    }
                }
            }

        }

// 转于帖子：http://topic.csdn.net/u/20110526/00/5f741340-9e77-4b31-8542-25db3633a086.html?seed=1540128036&r=73515856#r_73515856