C#实现系统桌面右下角弹框

  public partial class DropDownForm : System.Windows.Forms.Form

  {

  #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 DropDownForm dropDownForm = new DropDownForm(); //实例化当前窗体

  private static int AW_HIDE = 0x00010000;

  private static int AW_SLIDE = 0x00040000;

  private static int AW_VER_NEGATIVE = 0x00000008;

  #endregion

  #region 该窗体的构造方法

  public DropDownForm()

  {

  InitializeComponent();

  //初始化工作区大小

  System.Drawing.Rectangle rect = System.Windows.Forms.Screen.GetWorkingArea(this);

  this.Rect = new System.Drawing.Rectangle(rect.Right - this.Width - 1, rect.Bottom - this.Height - 1,

  this.Width, this.Height);

  }

  #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

  #region 鼠标控制图片的变化

  private void pictureBox1_MouseEnter(object sender, EventArgs e)

  {

  for (int i = 0; i < imageList1.Images.Count; i++)

  {

  if (i == 1)

  pictureBox1.Image = imageList1.Images[i];

  }

  }

  private void pictureBox1_MouseLeave(object sender, EventArgs e)

  {

  for (int i = 0; i < imageList1.Images.Count; i++)

  {

  if (i == 0)

  pictureBox1.Image = imageList1.Images[i];

  }

  }

  #endregion

  #region 定义标识窗体移动状态的枚举值

  protected enum FormState

  {

  //隐藏窗体

  Hide = 0,

  //显示窗体

  Display = 1,

  //显示窗体中

  Displaying = 2,

  //隐藏窗体中

  Hiding = 3

  }

  #endregion

  #region 用属性标识当前状态

  protected FormState FormNowState

  {

  get { return this.InfoStyle; }

  set { this.InfoStyle = value; }

  }

  #endregion

  #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

  this.FormNowState = FormState.Display; //设置当前窗体的操作状态为显示

  }

  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()

  {

  switch (this.FormNowState)

  {

  case FormState.Display: //显示当前窗体

  if (this.Top <= this.Rect.Bottom - 192) //如果窗体没有完全隐藏

  {

  this.SetBounds(Rect.X, this.Top + 192, Rect.Width, this.Height - 192); //使窗体不断下移

  }

  else

  {

  this.Close(); //隐藏当前窗体

  this.FormNowState = FormState.Hide; //设置窗体的操作状态为隐藏

  }

  break;

  }

  }

  #endregion

  #region 返回当前窗体的实例化对象

  static public DropDownForm Instance()

  {

  return dropDownForm;

  }

  #endregion

  #region 在窗体的关闭事件中进行动态关闭

  private void DropDownForm_FormClosing(object sender, FormClosingEventArgs e)

  {

  e.Cancel = true;

  AnimateWindow(this.Handle, 800, AW_SLIDE + AW_VER_NEGATIVE + AW_HIDE);

  this.Close();

  }

  #endregion

  }