You should use the associated online help documentation that came with the object application to obtain details of the object model.
The help is quite easy to use. Each of the classes and collections can be clicked to jump to its page.
In CitectVBA, you must use the full Application object qualifier when referencing the properties and methods of the object. For example, you must use the full syntax "Application.ActiveDocument.PrintOut", instead of "ActiveDocument.PrintOut".