You have /toolbar to customize the current toolbar the way you want but certainly it doesn't allow for readouts and sliders.
You can disable the mIRC toolbar.. so the rest is about getting your own toolbar.
You could use /window and dock that window with a dll.
Dlls are made for these specifics cases, where you can't get what you want to be done with current scripting and such dlls exist, for example dcx.dll does docking very well.
Question is now is it that you simply don't want to use a dll for that, or are there real advantages of using a custom window as a toolbar?
I don't think there are real advantages others than getting new controls, I also don't think you actually want a custom window as a toolbar, rather, it would be a way to get what you want: new controls.
Therefore I think it would be a better addition to have more controls on the currrent toolbar, such as text and sliders, I'd love to see these two controls.
