Sergey, I was just looking at that when I got your response! Your ideas worked! I used the code below (I have to actually merge 4 arrays, but below is the code for merging one) to get it working:

*--Create an array from dfiles and sfiles arrays
LOCAL lntot,lnend
*--get current length of target array
lnend=ALEN(thisform.dfiles)
*--get new number of rows of target array by adding number of rows from source array to it
lntot=ALEN(thisform.dfiles,1)+ALEN(thisform.sfiles,1)
*--Redimension the target array to hold the additional rows from the source array
DIMENSION thisform.dfiles(lntot,5)
*--Copy the source array's rows to the target array starting at the first blank element
=ACOPY(thisform.sfiles,thisform.dfiles,1,-1,lnend+1)

Thanks again,
Tracy