# WAI-ARIA Support
This article demonstrates how to enable and use the WAI-ARIA support of the **RadDropDownTree** control.
The [ WAI-ARIA Suite ](https://www.w3.org/WAI/intro/aria), defines an approach to make Web content and Web applications more accessible to people with disabilities.
In order to enable the WAI-ARIA support, set the **RadDropDownTree** contol's **EnableAriaSupport** property to **true** as shown in the example below.
> caption **Example 1**: Setting the **EnalbeAriaSupport** property for **RadDropDownTree**.
```ASPNET
```
```C#
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
RadDropDownTree1.DataSource = GetDummyDepartments();
RadDropDownTree1.DataBind();
}
}
private List GetDummyDepartments()
{
return new List
{
new Department { ID = 1, ParentID = null, Name = "Head Office" },
new Department { ID = 2, ParentID = 1, Name = "HR" },
new Department { ID = 3, ParentID = 1, Name = "IT" },
new Department { ID = 4, ParentID = 3, Name = "Development" },
new Department { ID = 5, ParentID = 3, Name = "Support" },
new Department { ID = 6, ParentID = null, Name = "Branch Office" },
new Department { ID = 7, ParentID = 6, Name = "Sales" },
new Department { ID = 8, ParentID = 6, Name = "Logistics" }
};
}
public class Department
{
public int ID { get; set; }
public int? ParentID { get; set; }
public string Name { get; set; }
}
```
```VB
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
If Not IsPostBack Then
RadDropDownTree1.DataSource = GetDummyDepartments()
RadDropDownTree1.DataBind()
End If
End Sub
Private Function GetDummyDepartments() As List(Of Department)
Return New List(Of Department) From {
New Department With {
.ID = 1,
.ParentID = Nothing,
.Name = "Head Office"
},
New Department With {
.ID = 2,
.ParentID = 1,
.Name = "HR"
},
New Department With {
.ID = 3,
.ParentID = 1,
.Name = "IT"
},
New Department With {
.ID = 4,
.ParentID = 3,
.Name = "Development"
},
New Department With {
.ID = 5,
.ParentID = 3,
.Name = "Support"
},
New Department With {
.ID = 6,
.ParentID = Nothing,
.Name = "Branch Office"
},
New Department With {
.ID = 7,
.ParentID = 6,
.Name = "Sales"
},
New Department With {
.ID = 8,
.ParentID = 6,
.Name = "Logistics"
}
}
End Function
Public Class Department
Public Property ID As Integer
Public Property ParentID As Integer?
Public Property Name As String
End Class
```
> note In order to use WAI-ARIA the form element on the page must have a role attribute set to "application" (`