Примеры классов WMI

В следующих примерах показаны определения классов из схемы драйвера последовательного порта. Note that the guid values shown in these examples are placeholders. Каждое определение класса должно иметь уникальный GUID, созданный guidgen.exe или uuidgen.exe (которые включены в пакет SDK для Microsoft Windows).

// Standard class for reporting serial port information
// Class qualifiers 
[WMI, guid("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"),
Dynamic, Provider("WMIProv"),
WmiExpense(1),
Locale("MS\\0x409"),
Description("Description of class"]
 
//Class name 
class Vendor_SerialInfo {
 
//Required items 
    [key, read] 
     string InstanceName;
    [read]
     boolean Active;
 
// Bytes sent on port
// Property qualifiers 
    [read,
     WmiDataId(1),
     WmiScale(0),
     WmiComplexity(1),
     WmiVolatility(1000)]
     Description("Description of property")]
// Data item 
     uint64 BytesSent;
 
// Bytes received on port
    [read,
     write,
     WmiDataId(2),
     WmiScale(0), 
     WmiVolatility(1000)]
     uint64 BytesReceived;
 
// Who owns the port 
    [read,
     WmiDataId(4),
     WmiScale(0),              
     WmiVolatility(60000)] 
    string Owner;
 
// Status bit array
    [read, write,
     WmiDataId(3),
     WmiScale(0)]
     byte Status[16];
 
//The number of items in the XmitBufferSize array
    [read,
     WmiDataId(5),
     WmiScale(0),
     WmiComplexity(1),
     WmiVolatility(1000)]
     uint32 XmitDescriptorCount;       
 
//Array of XmitDescriptor classes
    [read,
     WmiDataId(6),
     WmiSizeIs("XmitDescriptorCount"),
     WmiScale(0),
     WmiComplexity(1),
     WmiVolatility(1000)]
    Vendor_XmitDescriptor XmitBufferSize[];
}

Ниже приведено определение класса для внедренного класса, показанного в предыдущем примере. Note that this class does not contain InstanceName or Active items.

// Example of an embedded class 
[WMI, guid("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"),
class Vendor_XmitDescriptor {
    [read, WmiDataId(1)] int32 DestinationIndex;
    [read, WmiDataId(2)] int32 DestinationTarget;
}

Ниже приведено определение класса для блока событий. The class is derived from WmiEvent.

// Example of an event
[WMI, Dynamic, Provider("WMIProv"),
guid("{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}"),
locale("MS\\0x409"),
WmiExpense(1),
Description("Notify Toaster Arrival")]
class ToasterNotifyDeviceArrival : WMIEvent
{
    [key, read]
    string      InstanceName;

    [read]
    boolean           Active;

    [read,
     Description("Device Model Name"),
     WmiDataId(1)]    string     ModelName;
};