At design time, I'd like to be able to display a tooltip when the user hovers over the control. In the custom designer, I've overridden OnMouseHover and set the tooltip text there. The ToolTip is a member of the control being designed. Display of the tooltip is flaky - sometimes it doesn't appear at all, other times it flashes on briefly, but disappears quickly - long before the AutoPopDelay property says it should.

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ex-eunuchs hacker

Make sure you don't display it right at the mouse cursor. If the cursor overlaps the tool tip, it will immediately disappear again.

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Hans Passant.

Make sure you don't display it right at the mouse cursor. If the cursor overlaps the tool tip, it will immediately disappear again.

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Hans Passant.

Thanks for your reply - you inspired me to position the tip at a fixed offset from the control's top-left with Show(string, control, Point). Now works as expected whether or not the cursor overlaps the tooltip. I wasn't doing an explicit Show(.) before which makes me wonder why it worked at all in v1.

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ex-eunuchs hacker