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


  • $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.


Basic Examples  (1)

Set the directory:

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:

Terminate the external programs:

Reset to the original directory:

Introduced in 1996