The Columns in the UltraWinGrid have an Editor and  EditorControl property. These properties can be assigned either an EmbeddableEditorBase or an IProvidesEmbeddableEditor control respectively. So the grid column can use any embeddable editor control as it's editor.

    In addition to that, it's possible to assign a ValueList to a column to provide a dropdown list. 

    Some of the editors, like UltraTextEditor, for example, allow you to add buttons or dropdown buttons. So you could drop down a control of your choice within a grid cell.

    But there is no way to place just any control in a cell automatically.