Is there a method to index and array of a UDT?

Hello all,   I am working with an Rockwell  1769-L18ER PLC and Studio 5000 version 32.  I am trying to setup an array of my UDT and index thru the array with a DINT.   I assumed the syntax would be something like  MyUDTArray[IndexDINT].Member but Studio 5000 indicates an error. Is there a method to index and array of a UDT? An example would be great. 

 Any feedback is appreciated.