Determines if video mirroring is active.

OSErr DMIsMirroringOn (
    Boolean *isMirroringOn
);

isMirroringOn

On return, a pointer to a Boolean value; true indicates that mirroring is on; false indicates it is not.

function result

A result code.

SPECIAL CONSIDERATIONS

Because this function may move or purge memory blocks or access handles, you cannot call it at interrupt time.

AVAILABILITY

Supported in Carbon. Available in CarbonLib 1.0 and later when InterfaceLib 7.5 or later is installed. Exported by CarbonLib 1.0 and later and by InterfaceLib 7.5 and later.

© 2000 Apple Computer, Inc. — (Last Updated 3/8/2000)