BLT allows this, and you can acces it via Tcl::Tk perl module from CPAN.

not exactly your code, but very closely related example is at http://vkonovalov.ru/cgi-bin/perl-tcltk-wiki.cgi/40

In reply to Re: Multiple rows of notebook tabs in Tk by Courage
in thread Multiple rows of notebook tabs in Tk by biochris

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