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this.gridControl1.Model.Options.SelectCellsMouseButtonsMask = MouseButtons.Left;
If you want to control the context menus of active cell controls, you may need to use the technique discussed in this thread.
http://64.78.18.34/Support/Forums/message.aspx?MessageID=13861
Private Sub SelectionChanging(ByVal sender As Object, ByVal e As GridSelectionChangingEventArgs) If e.Reason = GridSelectionReason.MouseDown And Control.MouseButtons = MouseButtons.Right Then Dim row, col As Integer Dim pt As Point = Me.GridDataBoundGrid1.PointToClient(Control.MousePosition) If Me.GridDataBoundGrid1.PointToRowCol(pt, row, col, -1) Then Dim rangeList As GridRangeInfoList rangeList = Me.GridDataBoundGrid1.Selections.GetSelectedRows(True, False) If rangeList.AnyRangeIntersects(GridRangeInfo.Cell(row, col)) Then e.Cancel = True End If End If End If End Sub