TdxShellTreeView.GroupIndex Property
Specifies the group of shell controls to which the Shell Tree View control belongs.
Declaration
property GroupIndex; default -1;
Property Value
| Type | Description |
|---|---|
| Integer | The index of the group of shell controls to which the Shell Tree View control belongs. |
Remarks
Use the GroupIndex property to associate the Shell Tree View control with other DevExpress shell controls. Associated shell controls synchronize displayed content.

To associate supported shell controls, set their GroupIndex property to the same integer value. If the GroupIndex property is set to a negative value, the Shell Tree View control does not synchronize its content with other supported shell controls in an application.
You can use the GroupIndex property to synchronize content in the Shell Tree View control with the following shell controls:
- TcxShellComboBox
- A Shell Combo Box editor.
- TdxShellBreadcrumbEdit
- A Shell Breadcrumb control.
- TdxShellListView
- A Shell List View control.
The GroupIndex property’s default value is -1.