vlax-invoke vs vlax-invoke-method

hello,
these are two diffrent function? or not?
also vla-get vs vlax-get-property...
best regards
Andrzej

 

yes. vlax-invoke and vlax-invoke-method are different.

yes. objects have properties and methods. The choice
of which function to use depends on whether you are
getting properties vs methods.

Vlax-invoke was part of vital lisp(I think). It can be
used in some cases to send data without first converting
it into variants and safe-arrays. The same is true with
vlax-get.

 

Andrzej,

Yes, they are different. In general, vlax-invoke, vlax-put and vlax-get are easier to
use (than vlax-invoke-method, vlax-put-property, vlax-get-property) because the
arguments supplied or data returned are similar to vanilla LISP. Similar in the sense
safe-array and variant conversion functions are often needed with the latter
functions.

Simplistic example. Let's say you want to move a block reference from its current
insertion point to 0,0,0. Both of the following will work. Vlax-put-property needs a
variant argument. Vlax-3D-point performs the list to variant conversion. Whereas the
vlax-put function does the variant conversion internally.

(vlax-put-property blockref 'InsertionPoint (vlax-3D-point '(0.0 0.0 0.0)))
(vlax-put blockref 'InsertionPoint '(0.0 0.0 0.0))

But this won't work:
(vlax-put-property blockref 'InsertionPoint '(0.0 0.0 0.0))
; error: lisp value has no coercion to VARIANT with this type: (0.0 0.0 0.0)

HTH
Joe Burke

 

What Doug and Joe said . . . and,

I've found that when working with vertical applications, i.e. Architectural
Desktop, it's adventagious to use vlax-put and vlax-invoke when working with
objects defined by these programs.

jb

 

and wrap those in a vl-catch-all-apply. not sure why this helps but it makes all the difference with Land Desktop
objects...

"User of Internet" <>
|>hello,
|>these are two diffrent function? or not?
|>also vla-get vs vlax-get-property...
|>best regards
|>Andrzej
|>

James Maeding
jmaeding at hunsaker dot com
Civil Engineer/Programmer