I'd like to open PDF and RTF files from Excel. I've tried some codes
but don't work. Followings are my codes which DON'T WORK. Please give
me some advice.

For PDF:
TaskID = Shell("C:\Program Files\Adobe\Acrobat 5.0\Reader
readme.txt,1")

For RTF:

Dim wrdApp As Word.Application
Dim wrdDoc As Word.Document
Set wrdApp = New Word.Application
Set wrdDoc = wrdApp.Documents.Open(FileName)

I need to launch the application and the file. TKS!