>In an array, we will use ALEN(laArray,1) to get the array len. However, if this is coming from an object's array, what is the appropriate syntax to use. I see that ALEN(loObject.aArray,1) does not work.

Something is wrong. The following works just fine:

*TESTCREATE.PRG
SET PROC TO TESTcrea
ox=createobj('arrayobj')
? alen(ox.aary,1)
? alen(ox.aary,2)
ox.changearray()
? alen(ox.aary,1)
? alen(ox.aary,2)

PROCEDURE testit
DEFINE CLASS arrayobj AS CUSTOM
   DECLARE aary[4,2]
PROC CHANGEARRAY
   DIMENSION this.aary[9,4]
ENDPROC
ENDDEFINE