In a datagridview I want to create/reset combobox cells in random locations

[engamor]

I have a datagridview with a fixed number of columns. Certain cells shall be configured as comboboxes. This I achieve with the following code:

ParameterDispla yGrid["ColumName","Ro wName"] = new DataGridViewCom boBoxCell();

I then provide to populate the combobox cell and everything works.

However: I may also need to revert later the same cell to a plain textbox, this I cannot figure out how to do.

Thanks for some hint.