Creates a copy of an existing Quartz color, substituting a new alpha value.
Original signature is 'CGColorRef CGColorCreateCopyWithAlpha ( CGColorRef color, CGFloat alpha );'
Available in Mac OS X version 10.3 and later.


A copy of the specified color, using the specified alpha value. You are responsible for releasing this object using CGColorRelease.

- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)