using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace WindowsApplication4{ public partial class Form3 : Form {  bool flag = false;  public Form3()  {   InitializeComponent();   flag = true;  }  #region user32.dll  //導入user32.dll  [System.Runtime.InteropServices.DllImport("user32")]  //聲明API函數  private static extern bool AnimateWindow(IntPtr hwnd, int dwTime, int dwFlags);  #endregion  #region 常量  //正面_水平方向  const int AW_HOR_POSITIVE = 0x0001;  //負面_水平方向  const int AW_HOR_NEGATIVE = 0x0002;  //正面_垂直方向  const int AW_VER_POSITIVE = 0x0004;  //負面_垂直方向  const int AW_VER_NEGATIVE = 0x0008;  //由中間四周展開或  const int AW_CENTER = 0x0010;  //隱藏對象  const int AW_HIDE = 0x10000;  //顯示對象  const int AW_ACTIVATE = 0x20000;  //拉幕滑動效果  const int AW_SLIDE = 0x40000;  //淡入淡出漸變效果  const int AW_BLEND = 0x80000;  #endregion  #region 判斷方向  public int IsHorOrVer(int pos)  {   int rtn = 0;   //判斷是正方向還是反方向   if (pos.Equals(0))   {    //判斷是橫向還是縱向    if (flag)     rtn = AW_HOR_POSITIVE;    else rtn = AW_VER_POSITIVE;   }   else if (pos.Equals(1))   {    //判斷是橫向還是縱向    if (flag)     rtn = AW_HOR_NEGATIVE;    else rtn = AW_VER_NEGATIVE;   }   return rtn;  }  #endregion  private void button1_Click(object sender, EventArgs e)  {   //動畫――窗體向上拖拉   AnimateWindow(this.Handle, 1000, AW_SLIDE | AW_HIDE | IsHorOrVer(1));   //動畫――窗體向下拖拉   AnimateWindow(this.Handle, 1000, AW_SLIDE | AW_ACTIVATE | IsHorOrVer(0));   //動畫――窗體淡出特效   AnimateWindow(this.Handle, 1000, AW_BLEND | AW_HIDE | IsHorOrVer(1));   //動畫――窗體淡入特效   AnimateWindow(this.Handle, 1000, AW_BLEND | AW_ACTIVATE | IsHorOrVer(0));   //動畫――窗體由四周向中心縮小直至消失   AnimateWindow(this.Handle, 1000, AW_CENTER | AW_HIDE | IsHorOrVer(1));   //動畫――窗體由中心向四周擴展   AnimateWindow(this.Handle, 1000, AW_CENTER | AW_ACTIVATE | IsHorOrVer(0));  } }}