The IndexExtEnum type specifies the index of the part of the EBN object to be accessed. The Index parameter of the CellBackgroundExtValue property indicates the index of the part of the EBN object to be changed or accessed. The Exontrol's eXButton WYSWYG Builder helps you to generate or view the EBN String Format, in the To String field. The list of objects that compose the EBN are displayed on the left side of the Builder tool, and the Index of the part is displayed on each item aligned to the right as shown in the following screen shot:

In this sample, there are 11 objects that composes the EBN, so the Index property goes from 0 which indicates the root, and 10, which is the last item in the list

So, let's apply this format to an object, to change the exPatternExt property for the object with the Index 6:

Before calling the BackgroundExt property:

After calling the BackgroundExt property:

and now, let's change the exPatternExt property of the object with the Index 6 to 11 ( Yard ), so finally we got:

The IndexExtEnum type supports the following values: