Custom Data Source in ArcEngine

Discussion created by liuyu-esrichina-com-cn-esridist on Jul 29, 2010
    I have a problem in ArcEngine About Custom Data Source .I know ,iPluginWorkFactoryhelper,ipluginworkspacehlper,iplugindatasethelper,iplugincursorhler are implemented,three methods made me confused,NextRecord(),queryshape(),queryvalues(),I want to know how does it works,namely the workflow of ArcEngine, bacause i think queryshape() and queryvalues() are called by the system,i want to know the sequence of that,beside i want to know when FetchById() is execute?