How to use env variables in the 'include paths' project settings?

[mikieB]

In VS I can do

$(MySwPath)\Include

where 'MySwPath' is an env var....

How can I do something similiar in LW>?

Thanks

[KristenC]

Hi mikieB,

This KnowlegeBase article talks about what you need:
"Working with Environment Variables in LabWindows/CVI"
http://digital.ni.com/public.nsf/allkb/6BE05EADFCC66623862565F60061C96A?OpenDocument

Basically, you'll need to use the function getenv.

for example, you'd do: getenv(MySwPath).

Let me know if you have any questions.

[mikieB]

'Hi mikieB,

This KnowlegeBase article talks about what you need:
"Working with Environment Variables in LabWindows/CVI"
http://digital.ni.com/public.nsf/allkb/6BE05EADFCC66623862565F60061C96A?OpenDocument

Basically, you'll need to use the function getenv.

for example, you'd do: getenv(MySwPath).

Let me know if you have any questions.



 

Kristen
National Instruments
Applications Engineer

'

Nope, that is not it....try it..it does not work...

I want to access the enviornment vars from the

options->enviornment->includePaths

Window...

anyone else

[KristenC]

Hello mikieB,

I checked with R&D and unfortunately LabWindows/CVI does not support using environment variables when specifying include paths.  If you'd like you can can create a product suggestions and R&D will consider including this in a future version of CVI.  Here is a link to the Product Suggestion Center.

Please let me know if you have any questions.

[msaxon]

A partial workaround is to use the subst command to map a drive letter to the root of a directory tree you want to access, e.g.:

subst X: "C:\Program Files\National Instruments\CVI85"

(This would have to be done each time the computer is rebooted I think).

You would then be able to use this drive letter in your include paths. Later, if the path changes (e.g. if you are moving to a new CVI release) you can just change the subst command you use. You can use subst multiple times to map different drive letters to different folders.

A similar thing can be done by mapping a network drive to the folder, but that is a bit over the top for local folders.