A family of Microsoft word processing software products for creating web, email, and print documents.
I now believe that the information that I posted above is not correct and that user-defined caption labels are stored in the user's Normal.dotm template.
If you include an AutoNew macro in the template that is being distributed that contains the following code, the first time that the user creates a new document from the template, the label will be added to the list of labels
Application.CaptionLabels.Add "MyNewCaptionLabel"
Your template will need to be saved as a Macro Enabled Template with a dotm extension.