Drag N Drop in TreeCtrl w/o TVSIL_NORMAL

I have a tree control in a dialog box that has a TVSIL_STATE image list associated with it, but no TVSIL_NORMAL image list. I want to support drag and drop operations within the tree, but
CreateDragImage() returns NULL if the tree has no normal image list. I tried adding a list of
1x1 bitmaps as TVSIL_NORMAL (I don't have the space in the control to add more images), but
CreateDragImage() still returned NULL, and adding the list removed the nice TVS_HASLINES |
TVS_HASBUTTONS glyphs :( I'm not terribly familiar with the specifics underlying drag and drop, so:

Question: Without derving a class, or adding more images, can I support drag and drop? If so, how?

-asf

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