I wrote the following code in VBA. This worked fine.

Range("C30").Value = Application.Index(Range("A1:I18"), "13",
"6")

I compared this code to the one below which is similar in format. Am I
correct in assuming in order to codify an Excel function in VBA all you
have to do is Add the prefix "Application." to the function name
followed by parenthesis and the internal variables? I assumed this
when writing the following code that yielded an error. When I ran the
code a dialog popped up stating "Object doesn't support this Property
or Method".

Range("C27").Value = Application.Address(Range("C26").Value, "4",
"4")

Perhaps the function "Address" was not recognized in VBA.

Although the "Application." prefix worked in the first line of code, I
thought one had to write "Application.WorksheetFunction." preceding the
actual excel function in order to codify the function. Would someone
please clarify?