For the most part, code written in 2003 and earlier works fine in 2007.
There are some intentionally deprecated objects, and some small changes
which I presume are more likely unintentional. You have to test all of your
existing code against 2007, and debugging it is the same process you had to
follow in 2003. Where I have found the most issues is in charting
(understandably, since this is where 75% of my programming is done) and in
the new shape objects, whose object model thus far defies comprehension.
Most of these inconsistencies are trivial; they will nonetheless cause your
code to halt.

- Jon
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Jon Peltier, Microsoft Excel MVP
Tutorials and Custom Solutions
Peltier Technical Services, Inc. - http://PeltierTech.com
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"Mark Stephens" wrote in message
...
Hi all,

I am returning to programming after a few years I was pretty proficient in
excel 2003 and when I finished I was aware that 2003 code often didn't run
in 2007 for some trivial reasons (rounded corners didn't work I recall).
Can anyone give me an opinion on the ease with which someone who knows
2003 can transfer to 2007 is it a walk in the park or a real pain or
somewehre in between?

Kind regards, Mark