How do I completely remove an inherited member from my custom control?

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.NET

custom-controls

Hello,

I'm writing a custom control based on the Textbox control for a Windows application using the .NET Framework, but I've run into a problem: the code I'm using works fine for hiding some inherited properties from the property grid, but they can still be manipulated. I would like to know if it is possible to completely remove an inherited member from a custom control. For example, my control has the multiline property hidden, but I'd like to have it's multiline flag permanently set to false. My code is as follows:

<Bindable(False)> _
<Browsable(False)> _
<DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)> _
<EditorBrowsable(EditorBrowsableState.Never)> _
Public Shadows ReadOnly Property Multiline() As Boolean
    Get
        Return False
    End Get
End Property
...

Protected Overrides Sub OnMultilineChanged(Byval e as System.EventArgs)
    Mybase.OnMultilineChanged(e)
    Mybase.Multiline = False
End Sub

This works perfectly hiding the property from being edited by user code, however, the second block of code seems to never pick up a changed event. What I mean is that when I drop the custom control into a windows form in designer mode, the little arrow (the one with the tiny white square and a black arrow pointing east) on the control still shows up, allowing me to change this property manually when clicked. Is there any way to completely remove this property? Any help here would be greatly appreciated!!

[edit]Code block move to just the code - OriginalGriff[/edit]