C＃窗体的淡入淡出功能（项目工程源码）

先给大家看一下效果，感觉还可以

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
             //淡出特效隐藏
            if (Win32.AnimateWindow(this.Handle, 2300, Win32.AW_BLEND | Win32.AW_HIDE)) {
                //淡入特效显示
                Win32.AnimateWindow(this.Handle, 2300, Win32.AW_BLEND | Win32.AW_ACTIVATE);
            }

        }
       
    }


     public class Win32
    {
        /// <summary>
        /// 执行动画
        /// </summary>
        /// <param name="whnd">控件句柄</param>
        /// <param name="dwtime">动画时间</param>
        /// <param name="dwflag">动画组合名称</param>
        /// <returns>bool值，动画是否成功</returns>
        [DllImport("user32.dll")]
        public static extern bool AnimateWindow(IntPtr whnd, int dwtime, int dwflag);
 
        /// <summary>
        /// 从左到右显示
        /// </summary>
        public const Int32 AW_HOR_POSITIVE = 0x00000001;
        /// <summary>
        /// 从右到左显示
        /// </summary>
        public const Int32 AW_HOR_NEGATIVE = 0x00000002;
        /// <summary>
        /// 从上到下显示
        /// </summary>
        public const Int32 AW_VER_POSITIVE = 0x00000004;
        /// <summary>
        /// 从下到上显示
        /// </summary>
        public const Int32 AW_VER_NEGATIVE = 0x00000008;
        /// <summary>
        /// 若使用了AW_HIDE标志，则使窗口向内重叠，即收缩窗口；否则使窗口向外扩展，即展开窗口
        /// </summary>
        public const Int32 AW_CENTER = 0x00000010;
        /// <summary>
        /// 隐藏窗口，缺省则显示窗口
        /// </summary>
        public const Int32 AW_HIDE = 0x00010000;
        /// <summary>
        /// 激活窗口。在使用了AW_HIDE标志后不能使用这个标志
        /// </summary>
        public const Int32 AW_ACTIVATE = 0x00020000;
        /// <summary>
        /// 使用滑动类型。缺省则为滚动动画类型。当使用AW_CENTER标志时，这个标志就被忽略
        /// </summary>
        public const Int32 AW_SLIDE = 0x00040000;
        /// <summary>
        /// 透明度从高到低
        /// </summary>
        public const Int32 AW_BLEND = 0x00080000;
    }

}