I am developing a composite control , and its smart , but I want to make samrt tag browse files to get image file from the root directory , Is it need extending smart tag ?
i think the folloiwng article may be helpful to you.
http://www.codeproject.com/KB/dotnet/SmartTagDesigner.aspx
http://msdn.microsoft.com/en-us/library/ayybcxe5.aspx