turn off selected object vray material reflection

Hi i try another one

for obj in selection do 
(
	if obj.material ==(getClassInstances VrayMtl) then
	(
		obj.reflection = color 0 0 0
	)
)

this time it show ok in maxscript listener, but nothing change in vray material,really hope someone could help me, thank you.

I try this

for x in (getClassInstances VrayMtl) do
(
	x.reflection = color 0 0 0
)

but it turn off all vray material reflection, i want it to turn off only the selected one, someone please help me.

But bear in mind that the affected materials may be applied to other objects as well and so these objects will lose their reflections too.

(
mtls = getClassInstances VrayMtl
for node in selection where node.material != undefined do (
	
	for mtl in mtls where (findItem (refs.dependentNodes mtl) node) > 0 do mtl.option_traceReflection = false
	
)
)

jahman: Thank you very much, it work!