VB can't interpolate newlines, tabs, etc. within a string in the same manner C++ can.
You'll need to do something like this:
yourString = "Following is a tab " & vbTab & ". Following is a newline & " vbCrLf
You can use the ascii counterparts as well, if you wish:
yourString = "Following is a tab " & Chr(9) & ". Following is a newline & " Chr(13) & Chr(10)