Stéphane,
That's exactly what I needed!
It seems that setting more than 32k is not an issue for some reason.
Thank you!
In case it helps someone, below is the code I used:
get_html_value:
html_value$=html'value$
if len(html_value$)=32000 then while html'pvxextdata; html_value$+=html'pvxextdata$; wend
return