Using vlax-get-property with parameters

Hi,

I have a problem getting information from an ActiveX. The object I use has a property where I have to put an integer as a parameter. I tested it in debug, and no matter what is the value I put in the parameter, the object receives 0. I also tried the vlax-invoke-method, but it crashes. Is it a limitation from VLISP ?
Any help will be appreciated.
Thanks

 

Show some code so we can see what's going on.

a property where I have to put an integer as a parameter. I tested it in
debug, and no matter what is the value I put in the parameter, the object
receives 0. I also tried the vlax-invoke-method, but it crashes. Is it a
limitation from VLISP ?

 

Here is the code. It is a loop that goes from 0 to the number of points. At each call to vlax-get-property, the value that the ActiveX receive is 0.

(setq iCnt 0)
(while (< iCnt iVLNTotal)
(setq sVlnFromPnt (vlax-get-property axDG "VLNFromPnt" iCnt))
(setq iCnt (1+ iCnt))
)

 

Good. Now show us the ActiveX object.

Also, what is the value of iVLNTotal when you enter the While loop?

And what is VLNFromPnt? a property or a method?
Vlax-get-property expects only 2 arguments, but you are passing 3. If
VLNFromPnt is a method, you should be using Vlax-invoke-method.

At each call to vlax-get-property, the value that the ActiveX receive is 0.

 

That is actually the problem: VLNFromPnt is a property that needs a parameter. It does not take the parameter when using vlax-get-property and it crashes when using vlax-invoke-method.

 

try

(vlax-get <object> <property> <parameter>)

using vlax-get-property and it crashes when using vlax-invoke-method.