http://www.perlmonks.org?node_id=1013821


in reply to Re: Win32::GUI sending Windows messages between threads
in thread Win32::GUI sending Windows messages between threads [solved]

Same result with Postmessage (nothing happens).

A quick Google indicates the only difference between PostMessage and SendMessage is that PostMessage returns immediately while SendMessage waits for the recipient to process the message.

Anyway, I tried it. No difference.