property ExFileView.IncludeSubFolderIconKey as Long
Retrieves or sets a value that indicates the key of the icon to highlights folders that includes sub-folders.

TypeDescription
Long A Long expression that specifies the key of the icon to highlights folders that includes sub-folders.
By default, the IncludeSubFolderIconKey property is -1, which indicates that the control displays an arrow when the folder contains sub-folders as can seen in the following screen shot:

For instance, if IncludeSubFolderIconKey property is 0, the control displays no default arrow for folders that contains sub-folders.