Merge cells vertically

Hello
Is it possible to merge cells of a table control vertically?
See the second column in this example:
+--+--+
| | |
+--+ |
| | |
+--+--+
Ciao,
JensJens,
I tried doing that a few times with no success, I don't believe it can
be done any simple way. Unless someone has some insider information :)