Thankyou.
The example shown overrides the spreadsheet column class, to create the custom xaml code in every cell in a given column.
But how do I do this just for once cell? say $B$4 . And then if the user inserts a new column in A, the custom xaml control remains in the same relative cell, now being in cell $C$4 after the column is inserted?
What I am trying to achieve is a custom drop down list. Your existing cell validation list is limited to 256 characters in the list. I'd like a drop down of country names, with their flags. I can do the xaml for that, but getting into only a few certain cells is proving very difficutl