Use the AnimateWindow API function to implement an animation form

Declaration method:

Statement
[DllImportAttribute ("user32.dll")]
Private static extern bool AnimateWindow (IntPtr hwnd, int dwTime, int dwFlags );

Parameter description:

Code
(1). IntPtr hwnd: The Handle object of the target window, usually this. Handle
(2). int dwTime: animation duration. The longer the value is, the longer the animation effect.
(3). int dwFlags: Specifies the animation effect type option. It is declared as follows in C:
Note: you only need to declare the required animation type in your program. The meaning of each parameter will be described in detail later.
Public const Int32 AW_HOR_POSITIVE = 0x00000001;
Public const Int32 AW_HOR_NEGATIVE = 0x00000002;
Public const Int32 AW_VER_POSITIVE = 0x00000004;
Public const Int32 AW_VER_NEGATIVE = 0x00000008;
Public const Int32 AW_CENTER = 0x00000010;
Public const Int32 AW_HIDE = 0x00010000;
Public const Int32 AW_ACTIVATE = 0x00020000;
Public const Int32 AW_SLIDE = 0x00040000;
Public const Int32 AW_BLEND = 0x00080000;

Animation effect types:

1. AW_SLIDE: This type is used by default. This type is ignored when the AW_CENTER effect is used.

2. AW_ACTIVE: Activation window. This effect cannot be used when AW_HIDE effect is used.

3. AW_BLEND: fade-in effect

4. AW_HIDE: Hide the window

5. AW_CENTER: when used with the AW_HIDE effect, the effect overlaps the number of windows, and the window is extended separately.

6. AW_HOR_POSITIVE: display the window from left to right

7. AW_HOR_NEGATIVE: display window from right to left

8. AW_VER_POSITVE: display window from top to bottom

9. AW_VER_NEGATIVE: display the window from bottom to top

After understanding this, our work will become very simple.

After the program is started, the code of the animation display window is as follows:

Code
AnimateWindow(this.Handle, 1000, AW_SLIDE + AW_CENTER);

After the program is closed, the animation display window code is as follows:

Code
private void Form1_FormClosed(object sender, FormClosedEventArgs e)
　　　　{
　　　　　　AnimateWindow(this.Handle, 500, AW_SLIDE + AW_VER_POSITIVE + AW_HIDE);
　　　　}

The complete code of the program is as follows:

Code
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace FalshWindows
{
　　public partial class Form1 : Form
　　{
　　　　[DllImportAttribute("user32.dll")]
　　　　private static extern bool AnimateWindow(IntPtr hwnd, int　dwTime, int　dwFlags);
　　　　public const Int32 AW_HOR_POSITIVE = 0x00000001;
　　　　public const Int32 AW_HOR_NEGATIVE = 0x00000002;
　　　　public const Int32 AW_VER_POSITIVE = 0x00000004;
　　　　public const Int32 AW_VER_NEGATIVE = 0x00000008;
　　　　public const Int32 AW_CENTER = 0x00000010;
　　　　public const Int32 AW_HIDE = 0x00010000;
　　　　public const Int32 AW_ACTIVATE = 0x00020000;
　　　　public const Int32 AW_SLIDE = 0x00040000;
　　　　public const Int32 AW_BLEND = 0x00080000;
　　　　public Form1()
　　　　{
　　　　　　InitializeComponent();
　　　　　　AnimateWindow(this.Handle, 1000, AW_SLIDE + AW_CENTER);
　　　　}
　　　　private void Form1_FormClosed(object sender, FormClosedEventArgs e)
　　　　{
　　　　　　AnimateWindow(this.Handle, 500, AW_SLIDE + AW_VER_POSITIVE + AW_HIDE);
　　　　}
　　}
}