a-visual-style-is-active

Arguments:

Returns true if a Microsoft "Visual Style" is currently in effect; returns nil otherwise. The value will always be nil on platforms other than Microsoft Windows.

A Visual Style is in effect on Windows if there is a "manifest file" and the user has not selected "Windows Classic" in Control Panel | Display | Themes. See ide:include-manifest-file-for-visual-styles for more information.

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Created 2015.5.21.