Can ASP.NET validation controls display an exclamation point with tooltip message?

Can the standard ASP.NET Visual Studio validation controls d开发者_如何学编程isplay an icon with a tool tip message instead of text, the way the WinForms ErrorProvider controls work?

If not, is the AjaxToolkit's ValidatorCallout control the best approach? Is this control flakey?

Here is what you need, already covered. http://www.codeproject.com/KB/validation/RequiredTextBox.aspx