Did you see How to display Tool Tips for different parts of the Grid? FAQ #8149 ?

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>I guess, there is no way to achieve the listbox functionality when you move your mouse over an object, it displays the whole item in the tooltip, if there is not enough room.
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>I'd like to replicate the same behavior in the grid. The tooltip is shown correctly for the active cell (I use grid's textbox MouseEnter/Leave events), but doesn't work when you mouve mouse over.
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>Anyone was able to made it work? e.g. evaluate(column.ControlSource)
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>Thanks.