动态设置cxgrid列的Properties

myProperties1 :=  tcxcomboboxproperties.Create(nil);
  myProperties1.DropDownListStyle := lsEditFixedList;
  myProperties1.Items.Add(''并且'');
  myProperties1.Items.Add(''或者'');
  mycxviewColumn2.PropertiesClass := tcxcomboboxproperties;
  mycxviewColumn2.Properties := myProperties1;