Determine number of UUIDs of VMs that are currently using the device.
PRL_RESULT PrlSrvCfgDev_GetVmUuidCount( PRL_HANDLE hGenericDevice, PRL_UINT32_PTR pnVmUuidsCount );
PrlApiDisp.h
PRL_RESULT. Possible values are:
PRL_ERR_INVALID_ARG - either hDispCfg is not a valid PHT_DISP_CONFIG
PRL_SUCCESS - function completed successfully