Tooltip in Datagrid

Is there any way to show the tooltip in Datagrid for more than 30 seconds?

example, here is my code e.Item.Cells(开发者_运维知识库7).Tooltip = e.Item.Cells(6).Text

on mousehover the tooltip will be displayed only 6 or 7 seconds, is there any way to increase the time for the tooltip?

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No.

These tooltips are a browser behavior that you have no control over.

Instead, you can use a custom Javascript tooltip, such as this one.