How can I change the color of the title bars of Perl/Tk windows that I have show up in a Microsoft Windows application? I know how to change the title, $mw->title, or use $mw->overrideredirect to remove the said top bar altogether. I need to know how to change the color of of the title bar itself. The setPalette command changes the bottom bar color, but not the title bar color. Anyone know?

I have been looking for something like

$mw->fooBar(-bg = $chosenColor)

but I cannot seem to find anything.
Thanks