Check "Display animation rectangles on minimize, maximize, restore" check mark in the Enhancer options, to see such animation...
If that still doesnt work then you'll have to give me some more feedback on the matter as i dont have Vista installed.
Window Manager is discontinued, for WLM try the new, Enhancer for contact list docking, auto-hide, hide taskbar button, remove button flashing and remember keyboard layout in conversation windows
Messenger Plus! Live Enhancer
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