how to get the segment width of polyline with activex (vla)?

for a lwpolyline obj, i want to get the width at a Index.
i do this with:
(vla-getwidth obj par 'wid1 'wid2)
but it return false. who can tell me why?
in the help:
object.GetWidth Index, StartWidth, EndWidth
StartWidth
Double; output-only
The start width of the polyline at the given index.

 

Dream0001,

You have the correct code - check the values for wid1 and wid2 after using the getwidth method.

Peter

 

i use acad2004
but it really don't work .
and prompt wid1 can't be trans to variant

 

A bug in 2004? I'm still with R15 and it works.

Peter

 

Works here in R2005.

Specify start point:
Current line-width is 0.0000
Specify next point or [Arc/Halfwidth/Length/Undo/Width]:
Specify next point or [Arc/Close/Halfwidth/Length/Undo/Width]:
Specify next point or [Arc/Close/Halfwidth/Length/Undo/Width]:
Specify next point or [Arc/Close/Halfwidth/Length/Undo/Width]:
Specify next point or [Arc/Close/Halfwidth/Length/Undo/Width]:
Specify next point or [Arc/Close/Halfwidth/Length/Undo/Width]:
Specify next point or [Arc/Close/Halfwidth/Length/Undo/Width]:
Specify next point or [Arc/Close/Halfwidth/Length/Undo/Width]:

Command: (setq obj (vlax-ename->vla-object (car(entsel))) INDEX 0)

Select object: 0

Command: (vla-getwidth obj index 'wid1 'wid2)
nil

Command: !WID1
0.0

Command: !WID2
0.0

Bill

 

HI dreamsky!
Check it out please!
http://discussion.autodesk.com/thread.jspa?messageID=3857100