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Old 04-30-2018, 11:44 AM
Norrit Norrit is offline
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Join Date: Aug 2001
Location: Landgraaf
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This is not a default Delphi/Windows implementation as far as I know

You could enhance your TEdit with a OnWarning (similar to OnHint) and implement it. Here you can also see how OnHint does this. Or if you're lazy just use the OnHint and enhance it's output a little.
Problem with ShowMessage (any message dialog for that matter) is that you must click it away to proceed and then the visual indiciation is lost.
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