Add an Item to Context Menu of Telerik Windows Grid View

Here is some code to work with Context Menu of Grid View of Telerik Windows Controls for Windows Forms

How to add an item to context menu of Grid View : To add custom item to context menu of the telerik grid view follow the steps below. For this code, I assume you are using Telerik Grid View for your Windows Forms and you have performed all necessary steps to bind your grid.

- Add an event handler 
AddHandler radGridView1.ContextMenuOpening, AddressOf radGridView1_ContextMenuOpening1

- Create contet menu event
Private Sub radGridView1_ContextMenuOpening1(ByVal sender As Object, ByVal e As Telerik.WinControls.UI.ContextMenuOpeningEventArgs)
        Dim menuItemExportToSpreadsheet As RadMenuItem = New RadMenuItem()
        menuItemExportToSpreadsheet.Text = "Export to Spreadsheet"
        AddHandler menuItemExportToSpreadsheet.Click, AddressOf ExportToSpreadsheet

        Dim separator As RadMenuSeparatorItem = New RadMenuSeparatorItem()
        e.ContextMenu.Items.Add(separator)
        e.ContextMenu.Items.Add(menuItemExportToSpreadsheet)
    End Sub

- Create click event of the newly added context menu item
Private Sub ExportToSpreadsheet(ByVal sender As Object, ByVal e As System.EventArgs)
'Your code goes here
End Sub

So, after doing this, each time you are on your grid view and you are opening your context menu you will see a new item get added to your context menu named "Expor to Spreadsheet", and on click of this you can perform logic written under its handler. 

This way you can add new menu item under your Telerik Grid Context Menu.