Trying to use a Block to ExTrim to

[ReachAndre]

Hey everyone,
I am trying to use a block to extrim to. I would like to trim the same side as mi insertion point. Can anyone give me an idea on why this is not woirking?
Thank all,
Andre

(defun c:locktrim ()
  (setq currlay (getvar "Clayer"))
  (setq lockpt1 (getpoint "\nSelect Daves Mid-cross: "))
  (setvar "Clayer" "Hardware")
  (command "-layer" "make" "0" "lock" "panels" "")
  (command "-insert" "lomountextrusiontrim" lockpt1 "1" "1" "0")
  (command "explode" "last")
  (c:extrim "last" lockpt1)
  (command "-insert" "lomountpaneltrim" lockpt1 "1" "1" "0")
  (command "explode" "last")
  (c:extrim "last" lockpt1)
  (princ))

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[CAB2k]

c:extrim will not accept arguments.

What are trying to do exactly, so someone can help you.
A picture please.

[j.f.moelee]

When at the command line you type (c:extrim) AutoCAD returns:
Pick a POLYLINE, LINE, CIRCLE, ARC, ELLIPSE, IMAGE or TEXT for cutting edge...
From this line you learn that you cannot give a block as parameter.
You need to select one or more elements (from the list above) inside the block to extrim to.

Correction:
You can only select one element from the block at a time.

[kennet.sjoberg]

Why use c:extrim when you can use the built in AutoCAD EXTEND or TRIM Command ?

: ) Happy Computing !

kennet

[ReachAndre]

Hopefully this is a better explanation;
I am trying to;
lock layer "Panels"
insert a block of a polyline
explode that polyline
use that polyline for an extrim object
(for which side to trim on) use the same side of the polyline as my pickpoint
erase that polyline

unlock layer panels
;;;repeat part1 with a different block

attached is a dwg which gives a better example.
I have also made a buttoin that works close to what I am trying to accomplish,
The button command txt is in this dwg
Thank you all again soon