m_pDevice is the handle to open the device. It is NULL initially. The function opens the device and the sensor associated with the hardware, and returns the handle to it.( It is supposed to but it doesnt)
I am sure there is no problem with the code, since I am using most of the code as provided in the source code. I am just missing something in the connection. Like you said,
"added the .lib file in the list of additional libraries/modules" or
"Project Properties->Linker->Input->Additional Dependencies"

I do not know what is supposed to be done in the above mentioned things. I would be really glad if you could put some light in that matter.
Thank you