I followed Mr. DPC's instructions and everything works well, but there is still one thing that's difficult and irritating. Each time I add new contents to the scrollable sprite, I have to reenter the right values which are different from time to time and VERY hard to figure out.
So I need a method to set the TOP and BOTTOM values but I don't know how... I am not an expert, please help! This scrollbar is awesome. This is the only problem I have. I cannot contact with the author because the forum is shut down.
I enclose the SWI file. If someone can edit it and send it to me, I would be really happy!