is the LinkObject representing the WSTP connection for an external program currently being installed or being called.


$CurrentLink
is the LinkObject representing the WSTP connection for an external program currently being installed or being called.
Details

- $CurrentLink is temporarily set by Install and by ExternalCall.
- You can use $CurrentLink to distinguish between several instances of an external program running at the same time.
- $CurrentLink can be included in :Pattern: and :Arguments: WSTP template specifications, and will be evaluated at the time when Install is called.
Examples
Basic Examples (1)
Install two instances of external WSTP-compatible programs:
Get usage information about linked-in symbols:
$CurrentLink is used keep track of different persistent variables:
Update the value of the link1 counter:
Check the value of the two counters:
See Also
Tech Notes
History
Introduced in 1996 (3.0)
Text
Wolfram Research (1996), $CurrentLink, Wolfram Language function, https://reference.wolfram.com/language/ref/$CurrentLink.html.
CMS
Wolfram Language. 1996. "$CurrentLink." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/$CurrentLink.html.
APA
Wolfram Language. (1996). $CurrentLink. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/$CurrentLink.html
BibTeX
@misc{reference.wolfram_2025_$currentlink, author="Wolfram Research", title="{$CurrentLink}", year="1996", howpublished="\url{https://reference.wolfram.com/language/ref/$CurrentLink.html}", note=[Accessed: 09-August-2025]}
BibLaTeX
@online{reference.wolfram_2025_$currentlink, organization={Wolfram Research}, title={$CurrentLink}, year={1996}, url={https://reference.wolfram.com/language/ref/$CurrentLink.html}, note=[Accessed: 09-August-2025]}