>>When I set tooltips on a grid column object (like textbox), it only displays when a cell is clicked, and only on the cell. Is there a way to display tooltips over an entire column (without a click)?
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>>Sparse setting doesn't change anything...
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>don't think so. it's like the grid won't let the column know where the mouse went. tooltip for the entire grid doesn't help, does it?

er, no...you can put invisible shapes over non-editable columns for the tips, but that's all I've come up with so far...