Thanks Ivan - your doc was very instructive! I have one question though
(below).

Ivan Prenosil wrote:

> * NULL can be returned from UDF, provided the value
> is passed by reference, not by value.

How? Set the returned pointer to nil (nil in pascal terms = null in C
terms).

And what if I use FB memory allocation:

procedure MyUDF(Result: PChar);

I can't free the passed buffer (well, I could but... urghhh...) and set
the pointer ot nil...

Kjell
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