The way a Param shows up on the symbol.

Hi Mark,

In the CDF for the VTN parameter you should be able to make the "display condition" a SKILL expression that returns t or nil to control whether the parameter is displayed or not - is this what you are looking for?

Hope it helps.

Lawrence.

Oh, and in the Interpreted Labels section you can mark the parameter to display only the value, not the name too, does that help?

Regards,

Lawrence.

 Hi Lawance, thanks for getting back to me.

    I'll have to look into the  Interpreted Labels section, I've not studed that. Its the name of the value I want to turn on and off. The value would be true or false and I'm not interested in displaying that, if possible.

    I was thinking alone the line of your 1st post. The callback and what is exicuted. So something like this:
  ( VTNi
      when((paramID = get(cdfgData 'VTN))
          if(paramID->value && paramID->value != "FALSE" then
          wParamID->display = "name" ; name no value
          else
          wParamID->display = "invisible"  ; no name and no value
      )
      )
  )

but that many not be able to over ride the

cdfId->paramLabelSet = " ... VTN ... "  in the CDF.

That's the concept ... I've not yet tried to figure outthe exact code. That's what I'm starting to look into now.

n/a