The short answer to the title question is: You don't.

A reference is effectively the address of a piece of memory in the address space of your perl process. When you start a new process, it cannot access that piece of memory in the originating process. Even if you passed the address to the new process and it attempted to dereference it, it would either a) segfault because the new process does not have that address in it's memory space, or b) it would access a piece of memory that holds some completely unrelated value.

You could using one of the shared memory modules on CPAN, (eg. Win32::MMF ) but they tend to be fairly platform specific (ie. most don't work on win32), awkward to use and often very slow.

Alternatively, you could consider using threads. Doing a Super Search for nodes containing threads Tk should throw up a few examples of using threads with Tk. But read them carefully, there are rules that must followed for that to be successful.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
Lingua non convalesco, consenesco et abolesco. -- Rule 1 has a caveat! -- Who broke the cabal?
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re: How do I pass a reference to another program via @ARGV ??? by BrowserUk
in thread How do I pass a reference to another program via @ARGV ??? by aplonis

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