A previous question described how to use .Font.Highlight of TextRange2 to highlight selected text.
How do I remove the highlight?
In particular either of the following...
ActiveWindow.Selection.TextRange2.Font.Highlight.RGB = 0
OR
ActiveWindow.Selection.TextRange2.Font.Highlight = 0
...result in black highlighting instead of no highlighting.
Using False or msoFalse in place of the zeros has the same effect. There doesn't seem to be a Boolean switch to turn highlighting on or off (as there is in Word) and there is no supporting documentation of any kind to be found.