Drag and Drop Ghost Image

Hey all, I can drag and drop an image from my extension to the active document in Illustrator. This works, however, while dragging through the extension itself, the mouse cursor doesn't change to show the dragged object (I think this is called a ghost image?). You cant even tell you're dragging until your mouse icon enters Illustrator and the cursor changes to show a little green + symbol.

When I run my extension in Chrome, and I try to drag an image, I do see the cursor change to show the item I'm dragging.

What can be done to make my extension, and even better, Illustrator itself, show the dragged item during the drag (ie. to change the cursor to a drag cursor with the ghost image)?

Any ideas?

Thanks,

Marshall