这个RaisePropertyChangedEvent怎么用？我找了半天都找不到

[shibill]

接着，向该控件添加 DrawingMode 属性。下面的代码将此属性添加到前面创建的控件中。

//DrawingMode - controls how the control paints

public DrawingModeStyle DrawingMode {

get {
return myDrawingMode;
}

set {
myDrawingMode=value;

//Set BackColor and ForeColor based on DrawingMode
SetColors();

//Raise property changed event for DrawingMode
RaisePropertyChangedEvent("DrawingMode");
}

}

'DrawingMode - controls how the control paints

Public Property DrawingMode As DrawingModeStyle

Get
Return myDrawingMode
End Get

Set
myDrawingMode=value

'Set BackColor and ForeColor based on DrawingMode
SetColors

' Raise property changed event for DrawingMode
RaisePropertyChangedEvent("DrawingMode")
End Set

End Property

C# VB

注意：属性 Set 代码包括对 RaisePropertyChangedEvent 方法的调用。此方法引发一个属性更改通知事件。引发属性更改通知事件很重要，因为 Windows 窗体设计器侦听此事件。设计器侦听此事件以便可跟踪属性是何时更改的。在该代码的后面部分，控件利用此事件。

这个RaisePropertyChangedEvent怎么用？我找了半天都找不到