请大家帮我看看出错的原因吧？


我正在写一个ActiveX控件，我写了如下的属性:

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dim m_NormalImageList as Object

Public Property Get NormalImageList() As Object

Set NormalImageList = m_NormalImageList

End Property


Public Property Set NormalImageList(ByVal New_NormalImageList As Object)

Set m_NormalImageList = New_NormalImageList

PropertyChanged "NormalImageList "

End Property

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为了在从设计模式切换到运行模式时保持属性的值，我写了如下事件代码：

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Private Sub UserControl_WriteProperties(PropBag As PropertyBag)

Call PropBag.WriteProperty( "NormalImageList ", m_NormalImageList, Nothing)

End Sub


Private Sub UserControl_ReadProperties(PropBag As PropertyBag)

Set m_NormalImageList = PropBag.ReadProperty( "NormalImageList ", Nothing)

End Sub

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我觉得一切都合理，可是在我调试的时候，这一句：

Call PropBag.WriteProperty( "NormalImageList ", m_NormalImageList, Nothing)

出现了错误：非法的参数。


很郁闷啊，请会这个的朋友指导我一下吧。




[解决办法]
不能保存 object，转换成具体的基本类型才能，例如 byte()/string/integer等之类的
[解决办法]
通常的做法是保存控件的名字，运行时根据名字去找控件。如：

' 以下在 UserControl 内
Private Function getCtlByName(ByVal CtlName As String)

Dim c As Control
Dim cs As Object

CtlName = UCase(CtlName)

Set cs = Parent.Controls

For Each c In cs
If UCase(c.Name) = CtlName Then
Set getCtlByName = c
Exit For
End If
Next

End Function