Create cell reference color coded border with square corners
 

Is there a way to create the special color coded borders with the square
corners that is formed around a cell when it is referenced through the Excel
object model.

I wanted to create such borders for cells selected in my defined function.
Is there a way to simulate it if it is not accessible through the Excel
object model.
The version of excel i am working on is excel 2003.

Many Thanks !