A better system would be defining an event of some sort, so your text could be something along the lines of:
"Hello, [event=ClinkLink,http://www.etc.com/] click here [-] to open a new window."
This would invoke the
ClickLink function in a component, with the string argument "
http://www.etc.com/". This system would allow you to do just about anything when certain characters / words / whatever are clicked, instead of just opening a link to a website.
Some thought would have to go into the rendering of the label:
How are they coloured?
Must they be coloured with [#ffffff]?
Are links coloured automatically?
Is there a universal link colour?
Is it per label?
etc.