Hi Martin,
there are (at least) two ways to do it. For labels, you can directly use TBURL32 control, which already looks as hyperlink. It is used for example in SampleScripts\UI\TextBox\TextBox.tBasic.
The second, more general way, is to shell default browser:
PetrUSES "OS" OS_ShellExecute("open", "http://www.thinbasic.com", "", "", 1)
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