How to add a new item to the default context menu of the GridView active editor

Thanks for the reply,
i tested it but i got a Null reference Exeption 'Object reference not set to an instance of an object.' i looked and found that the activeEditor.ContextMenu = Nothing.
please advise what i can do without havong to build my own context menu. i want to use the default popup menu.
Thanks,

I have reviewed my answer and think that it was not complete enough. Please accept my apologies. The editor's context menu is created once before it is shown. Thus, it was null in your case. To determine the moment when the context menu is shown, handle the RepositoryItemTextEdit.BeforeShowMenu event to add a custom menu item.

Visual Basic
Private Sub gridView2_ShownEditor(ByVal sender As Object, ByVal e As EventArgs)  
           Dim textBox As TextEdit = TryCast(gridView2.ActiveEditor, TextEdit)  
           AddHandler textBox.Properties.BeforeShowMenu, AddressOf Properties_BeforeShowMenu  
End Sub  

       Private Sub Properties_BeforeShowMenu(ByVal sender As Object, ByVal e As DevExpress.XtraEditors.Controls.BeforeShowMenuEventArgs)  
           Dim menu As DevExpress.Utils.Menu.DXPopupMenu = e.Menu  
           menu.Items.Add(New DXMenuItem("My item"))  
       End Sub  

This code is applicable for all the TextEdit class descendants.
I have created a sample based on your description. Please find it in the attachment.
I have updated my previous answer accordingly.

This saved the day