If you can't show us the code, consider working on reducing the code you have until it consists of little more than

use Win32::GUI;

# create main window
# connect MouseUp handler to events of the window

$main->Show();

[download]

Most likely while reducing your program to this minimal example, you will find where the error lies.

If you can't even do that, we cannot help you either.

In reply to Re^3: Win32::GUI problem by Corion
in thread Win32::GUI problem by Anonymous Monk

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