仿QQ自动隐藏窗体

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            
            System.Windows.Forms.Timer StopRectTimer = new System.Windows.Forms.Timer();
            StopRectTimer.Tick += new EventHandler(timer1_Tick);
            StopRectTimer.Interval = 50;
            StopRectTimer.Enabled = true;
            this.TopMost = true;
            StopRectTimer.Start();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (this.Bounds.Contains(Cursor.Position))
            {
                switch (this.StopAanhor)
                {
                    case AnchorStyles.Top:
                        this.Location = new Point(this.Location.X, 0);
                        break;
                    case AnchorStyles.Left:
                        this.Location = new Point(0, this.Location.Y);
                        break;
                    case AnchorStyles.Right:
                        this.Location = new Point(Screen.PrimaryScreen.Bounds.Width - this.Width, this.Location.Y);
                        break;
                    case AnchorStyles.Bottom:
                        this.Location = new Point(this.Location.X, Screen.PrimaryScreen.Bounds.Height - this.Height);
                        break;
                }
            }
            else
            {
                switch (this.StopAanhor)
                {
                    case AnchorStyles.Top:
                        this.Location = new Point(this.Location.X, (this.Height - 8) * (-1));
                        break;
                    case AnchorStyles.Left:
                        this.Location = new Point((-1) * (this.Width - 8), this.Location.Y);
                        break;
                    case AnchorStyles.Right:
                        this.Location = new Point(Screen.PrimaryScreen.Bounds.Width - 8, this.Location.Y);
                        break;
                    case AnchorStyles.Bottom:
                        this.Location = new Point(this.Location.X, (Screen.PrimaryScreen.Bounds.Height - 8));
                        break;
                }
            }

        }

        internal AnchorStyles StopAanhor = AnchorStyles.None;
        private void mStopAnhor()
        {
            if (this.Top <= 0 && this.Left <= 0)
            {
                StopAanhor = AnchorStyles.None;
            }
            else if (this.Top <= 0)
            {
                StopAanhor = AnchorStyles.Top;
            }
            else if (this.Left <= 0)
            {
                StopAanhor = AnchorStyles.Left;
            }
            else if (this.Left >= Screen.PrimaryScreen.Bounds.Width - this.Width)
            {
                StopAanhor = AnchorStyles.Right;
            }
            else if (this.Top >= Screen.PrimaryScreen.Bounds.Height - this.Height)
            {
                StopAanhor = AnchorStyles.Bottom;
            }
            else
            {
                StopAanhor = AnchorStyles.None;
            }
        }

        private void hide_LocationChanged(object sender, EventArgs e)
        {
            this.mStopAnhor();
        }

}

　　在WinForm中添加Load事件给Form1_Load，添加LocationChanged事件给hide_LocationChanged。

原理：主要是用Timer控件，在实时判断当前窗口的位置，如果在windows窗口的边上时，修改窗口的位置。当窗口隐藏后，实时判断鼠标的位置，如果在窗口附件，窗口显示。