Scrollable Area : the Commercial component option
Make it Scroll has also a commercial component to create a scrollable datagrid. A thing I like there is that they can also freeze any number of columns. Cool ;-)
The negative aspevt is the price, not really cheap 99$, but they have a trial version.
Here is what you can do with the ScrollableGrid:
By the way: the header scroll horizontally too!
UPDATE:
Bettoni Software has also another incredible component, they call it the SuperGrid. Try it for yourself online. It's the first time I can see a grid where I can change dynamically the columns size by drag and drop. I wonder how they achieve this .
You can also drag and drop any column to change the column order. Amazing ! And of course the headers are freezed.
I don't know if it's done with a behavior, but I believe so.
Yes it's an htc behind and the cost is 149 $ but the Source is included