How to highlight one line (isolated mode)

Hello everybody,

I have managed to build my own editor classifier, which color keywords, comments, etc. But I’m stuck with the apparently simple task of highlighting one single line from another package.

I would like to move the caret to a concrete line and highlight it. I can get the open document by DTE object, but I don’t find any useful method in this object. I don’t see the way to implement this in the editor classifier either.

I would appreciate your advice.

Pedro.