Automatically?

I certainly know how to do it straight to html - that's a no-brainer.

 foreach my $b (0 .. $LST){
print qq{my html or CGI formatted row here} or die 'unable to print';
}
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I'm trying to emulate the same function in Tk. I don't know how many rows the final user is going to need. And once it's handed over, the person using it will not be in a position to edit it.