>How can I get an array as function return value?

You simply can't.
If you want to do something like that you have to pass the array to the function by reference, manipulate it in your function and when you get back, you have your 'returned' array.

ex.

local laSomething[10]

*-- laSomething[5] equals .f.


MyFunction(@laSomething)

*-- returned from function call,
*-- now you can see that
*-- laSomething[5] equals 'kweeniewa'
? laSomething[5]

*-------------------------
function MyFunction
*-------------------------
LPARAMETERS taArray

taArray[5] = 'kweeniewa'

ENDFUNC


****************
Or you can return an object reference with user defined props.
Which is a bit closer to what you have in mind I think.