SDK for VS: reference to ntapadmin.dll cannot be added. make sure it is a valid assembly or COM

[Shubham]

I am adding a reference to ntapadmin.dll (32 bit) to my project which builds for 32-bit. I get an error saying its not a valid reference. I have triied setting my project build to Any CPU and to x64 but no luck. How do I get around this?