What are the use of of square brackets in vba (access)

Question

I'm looking through an access database for work currently and came across some confusing code.

Private Sub Form_Current()
  Me.Parent!PF = Me.[Compound Number]
  Me.Parent.start = Me.[Study Start]
    'over and over for different variables
end sub

I'm wondering what the brackets are for in vba (outside of arrays)and why someone would need this code. Thanks

Answer 1

Without the brackets you would have :

Me.Compound Number

Which would be a call to a routine called Compound with an argument called Number.

The square brackets escape the object name that contains a space (or other reserved characters, symbols or words).