OpenCL is not engaged with ATI graphics on Windows, what do I do to enable it?

If you have an ATI graphics adapter, and you're running Windows, OpenCL may not be turned on by default. The reason is because ATI Catalyst video driver doesn't support OpenCL (unlike NVIDIA's graphics driver). In order to enable OpenCL on ATI cards, users must install ATI Stream SDK from the following page:
http://developer.amd.com/gpu/atistreamsdk/