So from you question I understand you want to send IOCTL to a driver, but in the driver code the implementation is not there. I am amusing that you have a valid device handle.
To have a dummy implantation you have update the driver code so that user mode can have some dummy data. See this link Driver Development Part 2: Introduction to Implementing IOCTLs
] to have an idea how to implement IOCTL.
In the code section most of the times I validate and extract the data from user buffer and do DbgPrint and complete the request using IoCompleteRequest. Remember if you don't have the driver code there is nothing much you can do about it, how have contact the driver author to support your IOCTL call.