Can you explain in english what this code is doing or suppose to do?

>Can someone offer any suggestions on how to clean up this code? My problem is that the customer number can have more than the allowed do nesting level occurrances of a specific sales order number. Below is the code for my DO WHILE. Note that the code is in a function called l_upddtl, and this code is calling that function, so there is a recursive call to that function within itself. HELP!!!
>*-- Scan through all item in sales order
> DO WHILE a_tmpf1->sono + a_tmpf1->custno = lc_cmpsono + lc_cmpcust AND ;
> NOT Cl_CmpDone
>
> *-- Update record number in array
> la_shipcmp[Cn_CurRec] = RECNO()
>
> *-- Update gets and set validation flags
> = w_browse()
>
> *-- Validate item
> IF l_upddtl(.t.)
> *-- Record is valid and has been saved
> SKIP
>
> *-- Store new position to ship complete array
> la_shipcmp[Cn_CurRec] = RECNO()
>
> IF EOF("a_tmpf1")
> *-- End of file, complete shipment is done
> la_shipcmp[Cn_Done] = .t.
> ll_return = .t.
>
> *-- Skip back one to position on last item of Sales Order
> SKIP -1
> ELSE
>
> *-- Check if complete shipment is done
> IF la_shipcmp[Cn_SavSono] <> a_tmpf1->sono
> *-- We are are on a different sales order, complete is done
> la_shipcmp[Cn_Done] = .t.
> ll_return = .t.
>
> *-- Skip back one to position on last item of Sales Order
> SKIP -1
>
> ENDIF
>
> ENDIF
>
>
> ELSE
> ll_return = .f.
>
> *-- Exit, so we can correct invalid get
> EXIT
> ENDIF
>
> ENDDO
>
>Thanks!