i don't think you can with any 32-bit types. dword doesn't work either. you would have to use 16 bit INT or WORD in your array.
the WORD_AS_DINT and DINT_AS_WORD blocks might help if you want to make a function block that takes a DINT as an INOUT, bit index as input, and true false value to set at the index as input, and then sets the bit within the DINT by converting it to two words, setting the bit in the word, and then re-builds the DINT from the two words.