in reply to Re^2: Win32::GUI window freezing, even with threading.
in thread Win32::GUI window freezing, even with threading.

I took that from http://perl-win32-gui.sourceforge.net/cgi-bin/docs.cgi?doc=reference-methods#dialog

There is no mention of "dequeue" anywhere on that page.

The problem is not the bit you did take from that page; it is the bit you added: 

#wait for data, print data to GUI textbox
while(Win32::GUI::DoEvents() != -1) {
    my $tmptxt = $DataQueue->dequeue();
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    $main_text_window->Append($tmptxt);
}

[download]

If the queue is empty, the call to dequeue() will block and your GUI will freeze.

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