Need help to highlight assembly constraint

Hi, I am wondering if you could help me with a problem I have?
I am trying to Highlight all Positioning constraints which meet my criteria. How can I do that?
I tried with something like this. (Part of the code)

Dim myConstraints() As Positioning.Constraint = theSession.Parts.Work.ComponentAssembly.Positioner.Constraints.ToArray()
For Each thisConstraint As Positioning.Constraint In myConstraints
constraintstringtocheck = (thisConstraint.Name.ToString())
If «criteria met» Then
thisConstraint.Highlight() ‘Highlight the Constraint in Constraint Navigator
End If
Next

A quick look through the documentation didn't turn up any way to highlight a constraint in the navigator or the graphics window. I'd suggest contacting GTAC to see if there is a way to highlight an assembly constraint. They might be able to offer a method to highlight the constraint; if not, they will open an "enhancement request" with the developers to add the ability to do so in a future version of NX.

Seems like I would be able to add the constraints to a Constraint Group "ILLEGAL CONSTRAINTS" instead of highlighting them.
But unfortunately I am not able to expand and show this group by code.
Any idea here?

Best Regards
Gunnar