Each section is represented by a Section object that can be obtained from the Document.Sections collection by the index.
Example SectionsAccessByIndex
Shows how to access a section at the specified index.
[C#]
Document doc = new Document(MyDir + "Document.doc");
Section section = doc.Sections[0];
[Visual Basic]
Dim doc As Document = New Document(MyDir & "Document.doc")
Dim section As Section = doc.Sections(0)
[Java]
Document doc = new Document(getMyDir() + "Document.doc");
Section section = doc.getSections().get(0);