_Document.UserControl Property
Office 2010
Determines if the document or application was created or opened by the user.
Assembly: Microsoft.Office.Interop.Word (in Microsoft.Office.Interop.Word.dll)
This property returns True if the document or application was created or opened by the user, and False if the document or application was created or opened programmatically. Set the property value to True or False to enable or disable the functionality.
If Word is visible to the user, this property will always return True.