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Callbacks enable an application to call a function defined at another layer or level. The application registers the function argument as a handler that is to be called asynchronously at a later time as required. The callback is invoked if the function completes asynchronously indicating function success or error. The callback is not called if the operation completes synchronously.
The Windows Web Services API includes the following callback functions:
- WS_ABANDON_MESSAGE_CALLBACK
- WS_ABORT_CHANNEL_CALLBACK
- WS_ABORT_LISTENER_CALLBACK
- WS_ACCEPT_CHANNEL_CALLBACK
- WS_ASYNC_CALLBACK
- WS_ASYNC_FUNCTION
- WS_CERT_ISSUER_LIST_NOTIFICATION_CALLBACK
- WS_CERTIFICATE_VALIDATION_CALLBACK
- WS_CLOSE_CHANNEL_CALLBACK
- WS_CLOSE_LISTENER_CALLBACK
- WS_CREATE_CHANNEL_CALLBACK
- WS_CREATE_CHANNEL_FOR_LISTENER_CALLBACK
- WS_CREATE_DECODER_CALLBACK
- WS_CREATE_ENCODER_CALLBACK
- WS_CREATE_LISTENER_CALLBACK
- WS_DECODER_DECODE_CALLBACK
- WS_DECODER_END_CALLBACK
- WS_DECODER_GET_CONTENT_TYPE_CALLBACK
- WS_DECODER_START_CALLBACK
- WS_DURATION_COMPARISON_CALLBACK
- WS_DYNAMIC_STRING_CALLBACK
- WS_ENCODER_ENCODE_CALLBACK
- WS_ENCODER_END_CALLBACK
- WS_ENCODER_GET_CONTENT_TYPE_CALLBACK
- WS_ENCODER_START_CALLBACK
- WS_FREE_CHANNEL_CALLBACK
- WS_FREE_DECODER_CALLBACK
- WS_FREE_ENCODER_CALLBACK
- WS_FREE_LISTENER_CALLBACK
- WS_GET_CERT_CALLBACK
- WS_GET_CHANNEL_PROPERTY_CALLBACK
- WS_GET_LISTENER_PROPERTY_CALLBACK
- WS_HTTP_REDIRECT_CALLBACK
- WS_IS_DEFAULT_VALUE_CALLBACK
- WS_MESSAGE_DONE_CALLBACK
- WS_OPEN_CHANNEL_CALLBACK
- WS_OPEN_LISTENER_CALLBACK
- WS_OPERATION_CANCEL_CALLBACK
- WS_OPERATION_FREE_STATE_CALLBACK
- WS_PROXY_MESSAGE_CALLBACK
- WS_PULL_BYTES_CALLBACK
- WS_PUSH_BYTES_CALLBACK
- WS_READ_CALLBACK
- WS_READ_MESSAGE_END_CALLBACK
- WS_READ_MESSAGE_START_CALLBACK
- WS_READ_TYPE_CALLBACK
- WS_RESET_CHANNEL_CALLBACK
- WS_RESET_LISTENER_CALLBACK
- WS_SERVICE_ACCEPT_CHANNEL_CALLBACK
- WS_SERVICE_CLOSE_CHANNEL_CALLBACK
- WS_SERVICE_MESSAGE_RECEIVE_CALLBACK
- WS_SERVICE_SECURITY_CALLBACK
- WS_SERVICE_STUB_CALLBACK
- WS_SET_CHANNEL_PROPERTY_CALLBACK
- WS_SET_LISTENER_PROPERTY_CALLBACK
- WS_SHUTDOWN_SESSION_CHANNEL_CALLBACK
- WS_VALIDATE_PASSWORD_CALLBACK
- WS_VALIDATE_SAML_CALLBACK
- WS_WRITE_CALLBACK
- WS_WRITE_MESSAGE_END_CALLBACK
- WS_WRITE_MESSAGE_START_CALLBACK
- WS_WRITE_TYPE_CALLBACK