I'm trying to come to grips with someone else's spreadsheet and am having trouble with some of the VBA code. Here is an example of it (the original is similar to this just a lot longer):

Code:
Public Sub Set_Z2()
  Z2(1, 1, 0) = 5
  Z2(1, 1, 1) = 0.62
  Z2(1, 1, 2) = 0.79
  Z2(1, 1, 3) = 0.89
  Z2(1, 1, 4) = 0.97
  Z2(1, 1, 5) = 1.02
 End Sub
The part I don't understand is the bit in brackets. "Z2" is (I'm pretty sure) supposed to be a variable but why is it followed by 3 numbers in brackets?

Cheers
-Rob