I am working with a GridDataBoundGrid.
I have a GridBoundColumn column with a GridListControl cell type. Is it possible to have a mask on that column in version 1.6? Because it is two different cell types.
You will have to derive a cell control from the masked edit cell and then add dropdown logic there. Dropdown logic can be added to any celltype with the GridDropDownCellImp class and associating it to DropDownImp.
But there is definitely some work required on your side. You will have to listen to ShowingDropDown, CloseDropDown and other events of the dropdown part to get things working correctly. If you have source code check out the comboboxcell implementation.