Currently I only need indication.
But a control is also welcome.
I still don't get it. You say you want indication, but indication of what?
As you said in your first post, there is something which you want to convert to number, right? What? You mention some labels or buttons, but from what you said, I still have no idea what you want to do with them.
Probably it's just me, perhaps others understand what you are talking about and can help...
You say:
Or when mouse is over any of them it could show a hint like "LE xx; BE yy".
Should the hint describe some byte? Which byte? What is LE, BE? Do you mean LO, HI? See the attached project, is this like something you ask for?