Following the (https://www.tensorflow.org/extend/adding_an_op) step by step.
The first two steps , i.e Registering the new_op and Initializing the kernels for the op are same for all operating systems.
Build the op library (https://www.tensorflow.org/extend/adding_an_op#build_the_op_library) is OS specific.
The code for Linux and mac users is given.
How to do it in windows?