委托的用法

  usercontrols:裡面寫法如下:

  public delegate void ButtonClickHandler();

 public event ButtonClickHandler ButtonClick;

  form1裡面定義時間:

  this.usercontrols.ButtonClick += new UserControl.UserMngControls.UserLogin.ButtonClickHandler(this.usercontrols _ButtonClick);

  private void userLogin1_ButtonClick()

  {

   MessageBox.Show(this.userLogin1.MReturn.ToString());

  }