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How to set ‘AjaxSpellCheck ContextMenu’ in RadEditor control to open bottom-top instead the default behavior (top-bottom )?

Hi there i have a radgrid on which i have to find a value and if the item is found then generate message
below is my code:
Protected Sub btnAdd_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnAdd.Click If IsAlreadyExist() Then ram.Alert("") Else If IsAlreadyAdded() Then ram.Alert("") Else employees() End If End If End SubPrivate Function IsAlreadyAdded() As Boolean 'If rgListnk.MasterTableView.Items.Count > 0 Then Dim itm As GridDataItem = rg.MasterTableView.FindItemByKeyValue("DEFAULT", "Y") If IsNothing(itm) Then Return False Else Return True End If End Function<KeyboardNavigationSettings AllowSubmitOnEnter="true" EnableKeyboardShortcuts="true" />