\&mysub

[download]
creates a reference to the sub mysub; 
\&mysub(...)

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calls mysub, then creates a reference to the returned value

I'm not familiar with TK, so I don't know what bind is supposed to do, but you might be able to achieve what you want with a closure: 

$input->bind('<Return>', [ sub { mysub($arg) } ] );

[download]

Dave.

In reply to Re: Binding Tk events by dave_the_m
in thread Binding Tk events by Scarborough

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