I found a KB article (200491) entitled: "Bug: Incorrect coordinates passed to OLEDragDrop / OLEDragOver." It points out that the HitTest method of TreeView control in COMCTL32.OCX requires x and y in "twips", but that the OLEDrag...event handlers are passed coordinates in pixels. Does this seem like the likely source my problem? If so, how to I convert from X,Y in pixels to X,Y in twips?

Thanks again,
Jim