It is important to understand how the Tools API works with files. The main interface is IOTAModule. A module represents a set of logically related open files. For example, a single module represents a single unit. The module, in turn, has one or more editors, where each editor represents one file, such as the unit source (.pas) or form (.dfm or .xfm) file. The editor interfaces reflect the internal state of the IDE's editors, so a wizard can see the modified code and forms that the user sees, even if the user has not saved any changes. 

The following topics provide information about the module and editor interfaces:

• Using module interfaces
• Using editor interfaces