Returns the size of the hard disk device.
PRL_RESULT PrlSrvCfgHdd_GetDevSize( PRL_HANDLE hHardDisk, PRL_UINT64_PTR pnSize );
PrlApiDisp.h
PRL_RESULT. Possible values:
PRL_ERR_INVALID_ARG - invalid handle or null pointer was passed.
PRL_ERR_SUCCESS - function completed successfully.