i am working on an xcode project. i got a tutorial from the web it is called the link can be found on this site under a thread called graphics. i don't know how to post a link. Intro to Quartz II. i opened x-code, and then chose file > New File and selected Objective-C NSView subclass. After i named the file drawing.m, i clicked finish. An x-code window opened up, drawing.h. The next step in the tutorial "after the class file is created, you drag the header file to the NIB window in Interface Builder so it knows about the class." my question is should interface builder start on its own. I opened it myself. Now I have an x-code window drawing.h, and interface builder open. What and where, is the header file the tutorial is talking about. And what is the NIB window? My interface builder doesen't look like the tutorials. where the tutorial says Instances, Classes, Images, Sounds, NIb my interface file displays Cocoa, Carbon, IB Kit and there is a section on the right of the tutorial which has a window open that says Groups & Files. i don't see this on my computer. Just wondering what i am doing wrong. a little of topic but how do i post a link to for example the tutorial i am using?