A small Query....

Your .VB file contains all the source code for the files. The .res (resource) files are needed only by the studio. Resources files simplify the process of compiling images, icons, etc by making them available in one place at compile time. If you're unfamiliar with objective programming then none of what I say next will make much sense and I strongly urge you to check out some books on the subject. All controls including the form control are classes. They are precompiled and made available in class libraries. These class libraries can be stored anywhere, but for the sake of brevity are centrally located in the GAC (Global Assemblies Center). When you drag a control from the toolbox to the designer desktop, a set of parameters are saved in a special area of the source code located near the top. It is usually hidden and you should not alter the code in that area. The area is identified with a REGION macro like this: #Region " Windows Form Designer generated code " While each control has it's own special parameters, all controls have a set of global parameters that are inherited from an abstract class called Control.