How can I show a Balloon Tip over a textbox?

Question

I have a C# WPF application using XAML and MVVM. My question is: How can I show a balloon tooltip above a text box for some invalid data entered by the user?

I want

Answer 1

Maybe you can host a Windows Forms control in WPF using the WindowsFormsHost type.

There is a walkthrough available on MSDN on how to do this:

Hosting a Windows Forms Composite Control in WPF

Using this technique you could perhaps use the System.Windows.Forms.ToolTip control. If you set this control's IsBalloon property to true it will display as a balloon window.