Windows Dev Center

NotificationHandler function pointer

A callback prototype that notifies the supplicant that there is a change in the Statement of Health (SoH) and re-authentication of a Network Access Protection (NAP) system connection is required. For the user to receive visual notification of a change in the SoH, the callback must remain in place until after authentication is complete.

Note  Never cancel the callback while re-authentication is in progress and the network connection is still valid. Never attempt to use any other mechanism to notify the supplicant that the SoH has changed.


typedef VOID ( CALLBACK *NotificationHandler)(
  _In_ GUID connectionId,
  _In_ VOID *pContextData


connectionId [in]

A GUID provided by the supplicant to EAPHost. This value specifies the logical network connection to re-authenticate.

pContextData [in]

Context data provided to EAPHost by the supplicant. This context data can be used by the supplicant for re-authentication.

Return value

This function pointer does not return a value.


A pointer to this callback function must be provided when calling EapHostPeerBeginSession. The callback may be called by EAPHost at any time prior to calling EapHostPeerClearConnection.


Minimum supported client

Windows Vista [desktop apps only]

Minimum supported server

Windows Server 2008 [desktop apps only]



See also

EAPHost Supplicant Callbacks



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