What does "with creative cloud" mean, what specific program? You've posted in the LR SDK forum which is about writing plug-ins for LR.
You also might describe more what you mean by converting to black & white. You can certainly desaturate (adjust Saturation to 0) to remove all the color from an image, but there are other ways of doing this to emphasize certain ranges of color by making them darker or lighter areas in the black-and-white image.
Here is an example of removing color three different ways in Lightroom that makes the lavender water lily either light or dark:
These aren't completely gray toned, they are more old-film colors using the split-toning operation in LR after converting to black-and-white.
This example in using Lightroom. There are similar things you can do with Photoshop.