# Context Menu

The **OverflowItem** ("**...**") shows a **RadContextMenuDropDown** with the overflown items and the [NavigationOptionsMenuItem](https://www.telerik.com/products/winforms/documentation/controls/officenavigationbar/options-dialog)

![WinForms RadOfficeNavigationBar Context Menu Overview](https://www.telerik.com/products/winforms/documentation/assets/b58d065d6539ec08a24dc72a3ace7129/officenavigationbar-context-menu001.png)

> important When the user clicks the **RadOfficeNavigationBarOverflowItem** ("**...**") to open the menu, the items in  the **RadContextMenuDropDown** are always rebuilt.

**RadOfficeNavigationBar** offers the **ContextMenuDropDown** property giving direct access to the RadContextMenuDropDown with items. The ContextMenuDropDown's **DropDownOpening**, **DropDownOpened**, **DropDownClosing** and **DropDownClosed** events are suitable for handling all aspects of opening and closing the menu drop down. Once the menu is opened, the ContextMenuDropDown.**Items** collection is populated with the correct items and they can be further customized according to the specific requirements.

#### Disable Notes item in the ContextMenuDropDown.DropDownOpened Event

```C#
private void ContextMenuDropDown_DropDownOpened(object sender, EventArgs e)
{
    foreach (RadItem item in this.radOfficeNavigationBar1.ContextMenuDropDown.Items)
    {
        if (item.Text.Contains("Notes"))
        {
            item.Enabled = false;
        }
        else
        {
            item.Enabled = true;
        }
    }
}
```

```VB.NET
Private Sub ContextMenuDropDown_DropDownOpened(ByVal sender As Object, ByVal e As EventArgs)
    For Each item As RadItem In Me.radOfficeNavigationBar1.ContextMenuDropDown.Items

        If item.Text.Contains("Notes") Then
            item.Enabled = False
        Else
            item.Enabled = True
        End If
    Next
End Sub
```

![WinForms RadOfficeNavigationBar DropDownOpened Event](https://www.telerik.com/products/winforms/documentation/assets/a9035e326c25fbedce74b110aeec8607/officenavigationbar-context-menu002.png)

## See Also

* [Structure](https://www.telerik.com/products/winforms/documentation/controls/officenavigationbar/structure)
* [Design Time](https://www.telerik.com/products/winforms/documentation/controls/officenavigationbar/design-time)
* [Getting Started](https://www.telerik.com/products/winforms/documentation/controls/officenavigationbar/getting-started)
* [Options Dialog](https://www.telerik.com/products/winforms/documentation/controls/officenavigationbar/options-dialog)