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I dug around the TCL interface some and was astonished to find some of the neat things it can do.

If you look inside the TCL download https://cpan.metacpan.org/authors/id/V/VK/VKON/Tcl-1.27.tar.gz you will find in the t subdirectory set-callback.t (which can be inspected via https://fastapi.metacpan.org/source/VKON/Tcl-1.27/t/set-callback.t). This exposes a method to create a program in the perl environment and "link" it to a name that TCL can call directly.

The original code posted in this thread is in Tk because I want(ed) to find a solution to my proposed approach - which is indipendent to Tcl.
TK runs under TCL, there is nothing you do in TK that is independent from TCL.When you said $int->Eval(); you were invoking TCL.

There is another way as well. https://fastapi.metacpan.org/source/VKON/Tcl-1.27/t/createcmd.t, that is createcmd.t from the same t subdirectory.


In reply to Re^5: Tk programmatically monitor change in Listbox by huck
in thread Tk (Tcl::Tk) programmatically monitor change in Listbox by IB2017

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