Thanks all, for your quick responses.
It's clear for me, the situation. SynEdit is a very good component like it is. I would like to propose a patch, but my knowledge is still very basic.
I needed that feature (Column Mode Editing) on a program, but i have implemented it, on an alternative way.
I intercept the keys, when mi editor is in ColumnMode (SelectionMode = smColumn), and process the action, using the Clipboard to enter the key pressed as it would be a "Paste in Column Mode": and I keep the Column Mode.
It works OK for me now. Although I lost the Clipboard information.
My problem now is ¿How can I change the cursor in order to indicate that the Editor is in Column Mode?
Thanks.