MS Word Create Custom Fields

DWOrlesky 

Might you be asking about Content Controls?

• Word Content Controls by Greg Maxey
• Repeating Data Using Document Property Content Controls and Other Mapped Content Controls
• Create a Form Using Word Content Controls by Greg Maxey

DWOrlesky 

What are you trying to accomplish, specifically? 

In Word, you can nest fields, so that a field uses the result of another field.