'Declaration
<ExtensionAttribute()> <ComVisibleAttribute(False)> Public MustInherit NotInheritable Class IEasyUAClientExtension
'Usage
Dim instance As IEasyUAClientExtension
[Extension()] [ComVisible(false)] public static class IEasyUAClientExtension
[Extension()] [ComVisible(false)] public ref class IEasyUAClientExtension abstract sealed