Tree Control Horizontal Scroll bar

I've tried everything I can think of to get a horizontal scroll bar to appear with the tree control, but I can't get it to show up. The vertical scoll bar works fine and shows up automatically without me needing to do anything specific, but it never does horizontal.

What is the syntax to make the horizontal scroll bar show up?

Still trying to figure this one out... the only thing I can do right now is set the width large enough so that horizontal scrolling would never be necessary. I would really like to know how to get the horizontal scroll bar though.

I didn't try with tree so far, but remember once I have a similar issue with the "List" control. Check if this post could help.
/javascript.forum.12973.5/list-control-and-horiz-scroll.html

Yes, I found that post also and I tried the flow setting already... no luck so far :(

Try this one -

#myTree .aw-list-box {
    overflow: auto;
    width: 100%;
}

#myTree .aw-item-template,
#myTree .aw-item-template .aw-item-box{
    overflow: visible;
}

you have to set tree id to "myTree" - obj.setId("myTree");