How do I scroll a CTreeCtrl when I am dragging an item up or down past the window?

How do I scroll a CTreeCtrl when I am dragging an item up or down past the window? Maybe like how Windows Explorer does it?

Someone earlier suggested using EnsureVisable()'s,...

Can someone post sample code? Just waht I need in OnMouseMove()



Thanks!

See Microsoft Knowlegde base Q162159: "TREESCRL Scrolls in a Tree Control During Drag-and-Drop"