In VB, how to change selected text?

[sthurlock]

This seems like it should be easy: loop through text in a pdf file, find a word and then change it. Thank you for any help you can give! -sthurlock

'example look for word "hello" then change to "goodbye"

If pdDoc.Open("c:\test\test.pdf") Then
  jso = pdDoc.GetJSObject
  If Not jso Is Nothing Then
    count = jso.getPageNumWords(0)
    For i = 0 To count - 1
       word = jso.getPageNthWord(0, i)
       If StrComp(word, "Hello", CompareMethod.Text)=0 Then
          jso.selectPageNthWord(0, i)
          '

HOW TO CHANGE SELECTED HERE?????

       End If
    Next i
    'then save and close doc    
End If