初识用API函数动画显示提示框 - 苏飞论坛

[code=csharp] public partial class Popup : Form
{

      #region 定义标识窗体移动状态的枚举值
      /// <summary>
      /// 定义标识窗体移动状态的枚举值
      /// </summary>
      protected enum FormState
      {

         Hide = 0,//隐藏窗体
         Display = 1,//显示窗体
         Displaying = 2,//显示窗体中
         Hiding = 3 //隐藏窗体中
      }

      #endregion
      #region 声明的变量
      private System.Drawing.Rectangle Rect;//定义一个存储矩形框的数组
      private FormState InfoStyle = FormState.Hide;//定义变量为隐藏
      static private Popup dropDownForm = new Popup();//实例化当前窗体
      private static int AW_HIDE = 0x00010000; //该变量表示动画隐藏窗体
      private static int AW_SLIDE = 0x00040000;//该变量表示出现滑行效果的窗体
      private static int AW_VER_NEGATIVE = 0x00000008;//该变量表示从下向上开屏
      private static int AW_VER_POSITIVE = 0x00000004;//该变量表示从上向下开屏
      #endregion
      #region 定义标识窗体移动状态的枚举值


      #endregion

      #region 用属性标识当前状态
      /// <summary>
      /// 用属性标识当前状态
      /// </summary>
      protected FormState FormNowState
      {
         get { return this.InfoStyle; } //返回窗体的当前状态
         set { this.InfoStyle = value; }  //设定窗体当前状态的值
      }
      #endregion

      #region 调用API函数显示窗体
      [DllImportAttribute("user32.dll")]
      private static extern bool AnimateWindow(IntPtr hwnd, int dwTime, int dwFlags);
      #endregion
      public Popup()
      {
         InitializeComponent();
         //初始化工作区大小
         System.Drawing.Rectangle rect = System.Windows.Forms.Screen.GetWorkingArea(this);//实例化一个当前窗口的对象
         this.Rect = new System.Drawing.Rectangle(rect.Right - this.Width - 1, rect.Bottom - this.Height - 1, this.Width, this.Height);//为实例化的对象创建工作区域
      }

      #region 显示窗体
      public void ShowForm()
      {
         switch (this.FormNowState)
         {
            case FormState.Hide:
                  if (this.Height <= this.Rect.Height - 192)//当窗体没有完全显示时
                  {

                     this.SetBounds(Rect.X, this.Top - 192, Rect.Width, this.Height + 192);//使窗体不断上移
                  }
                  else
                  {
                     this.SetBounds(Rect.X, Rect.Y, Rect.Width, Rect.Height);//设置当前窗体的边界
                  }
                  AnimateWindow(this.Handle, 800, AW_SLIDE + AW_VER_NEGATIVE);//动态显示本窗体
                  break;
         }
      }
      #endregion

      #region 关闭窗体
      public void CloseForm()
      {
         AnimateWindow(this.Handle, 800, AW_SLIDE + AW_VER_POSITIVE + AW_HIDE);//动画隐藏窗体
         this.FormNowState = FormState.Hide;//设定当前窗体的状态为隐藏
      }
      #endregion

      #region 返回当前窗体的实例化对象
      static public Popup Instance()
      {
         return dropDownForm; //返回当前窗体的实例化对象
      }
      #endregion

}[/code]
2.创建一个登陆的窗体包含2个按钮,一个是显示(button1),一个关闭(button2)
[code=csharp]/// <summary>
      /// 弹出动画窗口
      /// </summary>
      /// <param name="sender"></param>
      /// <param name="e"></param>
      private void button1 _Tick(object sender, EventArgs e)
      {
      Popup.Instance().ShowForm();
      }
      /// <summary>
      /// 关闭
      /// </summary>
      /// <param name="sender"></param>
      /// <param name="e"></param>
      private void button1 _Tick(object sender, EventArgs e)
      {
         Popup.Instance().CloseForm();
      }[/code]