Hi

You need the Documents.Open method.

In VBA it would be something like:

Sub OpenDocument()

Dim sPFN As String
Dim oDoc As Word.Document
Dim wdApp as word.Application

   'Get a reference to a Word application
   set wdApp = where ever you're getting that from

   'Get the path and file name from somewhere
   sPFN = "C:\My folder\My subfolder\MyDocument.doc"

   'Open the document
   Set oDoc = wdApp.Documents.Open(FileName:=sPFN)

   'You can now do stuff to the document

End Sub

You'll need to translate to C# and add appropriate error checking.

There are many parameters to the .Open method - look up Word VBA help for
the full details.

Hope this helps.

Shauna Kelly.  Microsoft MVP.
http://www.shaunakelly.com/word