The wpclsInitData method is called when an object class is instantiated. WPStyler first calls its parent, and it then locates the class file by class name so that it can query the module handle and save it as class data. WPStyler also loads and saves a pointer to its Desktop icon. If any class data is allocated in wpclsInitData, then you should override wpclsUnInitData to free that data when the class is destroyed.