IUPnPServiceCallback::StateVariableChanged method (upnp.h)

The StateVariableChanged method is invoked when a state variable has changed.

Syntax

HRESULT StateVariableChanged(
  [in] IUPnPService *pus,
  [in] LPCWSTR      pcwszStateVarName,
  [in] VARIANT      vaValue
);

[in] pus

Reference to an IUPnPService object that specifies the service about which the UPnP framework is sending the notification.

[in] pcwszStateVarName

Reference to a string that specifies the name of the state variable that has changed.

[in] vaValue

Specifies the new value. The type of the data returned depends on the data type of the state variable for which the notification is sent.

The application should return S_OK.