Similar to QQ pop-up window, automatically disappear

usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Linq;usingSystem.Runtime.InteropServices;usingSystem.Text;usingSystem.Threading;usingSystem.Threading.Tasks;usingSystem.Windows.Forms;namespaceformcpm{ Public Partial classForm1:form {Const intCountdown = -;//Countdown        intCurrcountdown = Countdown;//Countdown        BOOLIscount =true;        Thread thread;  PublicForm1 () {InitializeComponent (); Thread=NewThread (() =            {                 while(true)                {                    if(iscount) {if(Currcountdown <=0)                        {                             This. Invoke (NewAction (() =                            {                                 This.                            Close ();                            }));  Break; }                        Else{Thread.Sleep ( -); Currcountdown--;  This. Invoke (NewAction (() =                            {                                 This. Opacity = This. Opacity- This. Opacity/Countdown;                        })); }                    }                    Else{Thread.Sleep (Ten);                    }                }            }); Thread. IsBackground=true; } [DllImport ("User32")]        Private Static extern BOOLAnimateWindow (INTPTR hwnd,intDwtime,intdwFlags); //The following constants are available, which are declared in accordance with the results of an inappropriate animation        Private Const intAw_hor_positive =0x0001;//Displays the window from left to right, which can be applied in the migration Transitions animation and slide animations. Ignore this tag when applying aw_center tags        Private Const intAw_hor_negative =0x0002;//Displays the window from right to left, which can be applied in the migration Transitions animation and slide animations. Ignore this tag when applying aw_center tags        Private Const intAw_ver_positive =0x0004;//the top-down display window, which can be applied in the migration Transitions animation and slide animations. Ignore this tag when applying aw_center tags        Private Const intAw_ver_negative =0x0008;//Displays the window from the bottom up, which can be applied in the migration Transitions animation and slide animations. The tag is ignored when the aw_center tag is applied        Private Const intAw_center =0x0010;//if the aw_hide tag is applied, the window overlaps inside; otherwise it expands outwards.        Private Const intAw_hide =0x10000;//Hidden window        Private Const intAw_active =0x20000;//activates the window and does not apply this tag after the aw_hide tag has been applied        Private Const intAw_slide =0x40000;//applying the slide type animation result, the default is the migration Transition animation type, which is ignored when the aw_center tag is applied        Private Const intAw_blend =0x80000;//Apply Fade Results        Private voidForm1_Load (Objectsender, EventArgs e) {            intx = Screen.PrimaryScreen.WorkingArea.Right- This.            Width; inty = Screen.PrimaryScreen.WorkingArea.Bottom- This.            Height;  This. Location =NewPoint (x, y);//the setup form appears in the lower-right corner of the screenAnimateWindow ( This. Handle, +, Aw_slide | aw_active |aw_ver_negative); Thread.        Start (); }Private voidForm1_mouseenter (Objectsender, EventArgs e) {Iscount=false; Currcountdown=Countdown;
This. Opacity = 1d;
        }        Private voidForm1_mouseleave (Objectsender, EventArgs e) {Iscount=true; }    }}

Similar to QQ pop-up window, automatically disappear