Determines the number of USB devices in a virtual machine.
PRL_RESULT PrlVmCfg_GetUsbDevicesCount( PRL_HANDLE hVmCfg, PRL_UINT32_PTR pnUsbDevicesCount );
PrlApiVm.h
PRL_RESULT. Possible values:
PRL_ERR_INVALID_ARG - invalid handle or null pointer was passed.
PRL_ERR_SUCCESS - function completed successfully.