Viewport IPR Maxscript exposure?

V-Ray V-Ray for 3ds Max General
1

I know how to control VFB IPR with Maxscript.
Can I do same thing for Viewport IPR?

2

macros.run "VRay" "VRayViewportIPR"
Once to start it, once to stop it.

3

Thanks for the pointer. I checked the code.

vrayViewportIPRControl 0 3 - Vray viewport IPR on
vrayViewportIPRControl 0 4 - Vray viewport IPR off
vrayViewportIPRControl 1 3 - VrayGPU viewport IPR on
vrayViewportIPRControl 1 4 - VrayGPU viewport IPR off