A VB application might consist of more than one forms, each of which may have multiple controls. The information about each form and properties, the controls in it are saved into own file.

VB saves a "project" file which contains the list of files which VB loads when the "project" is loaded. The project file includes filenames of controls which exist as separate files with .OCX extensions

The project file is saved with an extension of .VBP Other files saved by VB include the following extensions:

- .FRX : graphics associated with the form
- .BAS : code not associated with control events