You can customize the icons used for expanding and collapsing the hierarchy in a hierarchical display by using the GetImage and SetImage methods in the SpreadView class, which is described in Customizing the User Interface Images.
An example of how the default hierarchy icons, a simple plus sign and minus sign, appear is shown here.
For more information about the hierarchical display, refer to the Working with Hierarchical Data Display.
Return to the overall list of tasks in Customizing Data Binding.