>I have a question about determining whether a variable is an array: From the Help file: (version 8, not 9!)
>
>You can also use the TYPE( ) function to check if a memory variable is an array. For example:
>? TYPE("myarray[1]")#"U"
>
>This apparently works as well for properties. Except for one special counter-example - native properties:
>
>Guesses on the results from the following?
>

?Type("loForm.visible(1)")
>?Type("loForm.visible(0)")

>
>Is there some other consistent method for determining whether a property is an array?

Try

type("alen(loForm.arrProperty)") <> "U"

or

try
  lnDim = alen(loForm.arrProperty,1)
catch to loNotArray
endtry