Use the Range.Text property to retrieve plain, unformatted text of the range.
Example RangesGetText
Shows how to get plain, unformatted text of a range.
[C#]
Document doc = new Document(MyDir + "Document.doc");
string text = doc.Range.Text;
[Visual Basic]
Dim doc As Document = New Document(MyDir & "Document.doc")
Dim text As String = doc.Range.Text
[Java]
Document doc = new Document(getMyDir() + "Document.doc");
String text = doc.getRange().getText();