The code for that is not actually implemented correctly. If you open pipe.vb and go to about line 50, then change to the code below, it will give you a highlight effect by changing the font color when a KeyCharacter is found in Text. You can then link the text to a string in the PLC using PLCAddressText.
'* Highlight in red if an exclamation mark is in text
If InStr(value, _HighlightKeyChar) > 0 Then
If MyBase.ForeColor <> _Highlightcolor Then SavedBackColor = MyBase.ForeColor
MyBase.ForeColor = _Highlightcolor
Else
If SavedBackColor <> Nothing Then MyBase.ForeColor = SavedBackColor
End If