Generating selection sets for another drawing using VLisp

Can anybody help with this:

(setq SSet (vlax-invoke-method (vlax-get-property PanelDoc 'SelectionSets)
'Add 0)
LLWP (vlax-3D-Point (list (- 10000) (- 10000) 0))
URWP (vlax-3D-Point (list 100000 100000 0))
);setq
(vlax-invoke-method sset 'select acSelectionSetWindow LLWP URWP 8
(vlax-make-variant "0"))

ACAD developer help says the FilterType should be an integer, but this gives
me an error:
"error: Automation Error. Invalid argument FilterType in Select"

Any ideas are MUCH appreciated.

 

You must put the Dxf Code and Value into safearrays.....here's your code
modified, based on that it looked like you wanted to get everything on layer
0.....

(setq SSet (vlax-invoke-method (vlax-get-property PanelDoc 'SelectionSets)
'Add "Layer0"))
(setq LLWP (vlax-3D-Point (list (- 10000) (- 10000) 0))
URWP (vlax-3D-Point (list 100000 100000 0))
iCode (vlax-safearray-fill
(vlax-make-safearray
vlax-vbinteger '(0 . 0)) '(8))
val (vlax-safearray-fill
(vlax-make-safearray
vlax-vbvariant '(0 . 0)) '("0"))
);setq

(vlax-invoke-method sset 'select acSelectionSetWindow LLWP URWP icode val)
(vla-get-count sset)