Why do not compile this code?

See more:

C++/CLI

from MSDN
http://msdn.microsoft.com/en-us/library/system.windows.forms.design.filenameeditor(VS.80).aspx[^]

public:
[EditorAttribute(System::ComponentModel::Design::FileNameEditor::typeid,
System::Drawing::Design::UITypeEditor::typeid)]
property String^ testFilename
{
String^ get()
{
return filename;
}
void set( String^ value )
{
filename = value;
}
}
private:
String^ filename;

I want see openFileDialog when propertyGrid's stringItem click event. :-)

but MSDN sample code is do not work.

compiler said "can not find FileNameEditor Class or NameSpace"

Plz help me.

used C++ / CLI, .NET 2.0, VS2008


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how can I check DLL file?

I'm changed my DLL file But

this file failed too



More Question~

in MSDN's sample code
VB : GetType(System.Windows.Forms.Design.FileNameEditor)
C# : typeof(System.Windows.Forms.Design.FileNameEditor)
C++: System::ComponentModel::Design::CollectionEditor::typeid

dose not used same class (vb, c#: FileNameEditor, c++: CollectionEditor)

Is it right??

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Thank you!! I find it!!