The WINPCAP is a free tool for link-layer network access in Windows environments. It allows applications to capture and transmit network packets bypassing the protocol stack， and has additional useful features， including kernel-level packet filtering， a network statistics engine and support for remote packet capture. By employing this development kit， it is easy for developers to program a GOOSE capture tool and then an analysis can be carried out with the captured network packets according to the ASN.1/BER. This paper introduces the whole development process of GOOSE capture tool， as well as some details about the design guidelines and realization process. Some possible applications are also given.