I had a similar issue and I subsequently moved on from it. I have a horizontal slider than can be dragged to expand a panel. I noticed using the Object Spy that the Left and ScreenLeft property would change when it was dragged. I was hoping to find a way to manipulate these properties with a script or something but never figured it out. Maybe something similar can be used in your case
Thanks for the suggestion. In the end, I ended up with using Keys. basically, I first set the slider to 0 position, using Home key, and then using Right key to precisely set the slider position to given value.
