Declare a variable
strEntireDoc As String
give the variable the value
strEntireDoc = ActiveDocument.Range.Text
Assuming c:\wordforms\test_document.doc is both open and the ActiveDocument. if it is open but NOT the ActiveDocument, then:
strEntireDoc = Documents(test_document.doc)
However, you can most likely manipulate whatever you want without actually putting the entire document into a variable. In fact, I would bet on it.
Gerry