How do I construct a varlena?

Can you tell me, please, how to construct a varlena (to be returned by
a function).

I see it is declared as an int and a 1-byte array; I don't know how to
assign a longer string in place of that 1-byte array; the compiler
complains about incompatible types, whatever I do.

Thank you.

-- 
Oliver Elphick                                Oliver.Elphick@lfix.co.uk
Isle of Wight                              http://www.lfix.co.uk/oliver
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     "And not only so, but we glory in tribulations also; 
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