Change report groups at RunTime

Hi,
Ho can we change the order of groups in Crystal report at runtime through VB code

Thanks in Advance
Manoj.

To make it more clear..
Eg.
Group X
Group Y
Group Z
Group M
...
...

But some time I want the groups like
Group X
Group M
Group Z
Group Y
...
...If you're passing a recordset to Crystal, you could just set the 'ORDER BY' in your query