Intra-text Adornment should hide when cursor is next to it (extending the 'Intra-text Adornment Sample')

I am analyzing the Intra-text Adornment Sample (https://code.msdn.microsoft.com/windowsdesktop/Intra-text-adornment-VS-9257bc99).

I am using the sample with the IntraTextAdornmentTagTransformer base class (#define HIDING_TEXT). The only way to change the color is to append something so it is not matched by the regex anymore and therefore doesn't get transformed. 

Is it possible that the Color Intra-text Adornment hides when the cursor is next to it so that the text can be changed? When the cursor is moved away, the adornment should replace the text again.

I appreciate any help on the matter.