How do I concatenate multiple fields

I have a situation pretty much identical to the one for post Q_21354613.html:
 I have a database table with the fields

STN0       LN                  Text
ST1           1                    Line 1 Text
ST1           2                    Line 2 Text
ST1           3                    Line 3 Text
ST1           4                    Line 4 Text

I want to concatenate the fields so I get the output :
STN0       Text.......
ST1         Line 1 Text Line 2 Text Line 3 Text Line 4 Text

The solution (Below) provided by Frodoman returns the message "A string can be at most 256 characters long."

Is there a way to get a longer result?

The previous solution from Frodoman:
I assume that you're grouping the report based on STN0 (If not then you probably will need to do so).  You can then use ST1 in your details section and create a formula in your details section like this:

shared stringVar sText;
sText := sText + ' ' + {table.ST1};

Now in the group footer create a formula to display the concatenated text:

shared stringVar sText;

And in the group header create a formula to reset it:

shared stringVar sText := '';