Which version niviison.dll have imaqROIToMask2?

Hi,

I use my PC NI vision assistant 2015 to create a C sample code and I find imaqROIToMask2 function in that.

But I transfer the program of C to another platform that show cant't find imaqROIToMask2, I check NIVisionCVI.chm

and can't find the function too,so if the function exist in different version of nivision.dll?