How to make a WPF Window to blink on the taskbar?

Question

A given moment my WPF app needs user attention. I know it is possible to make the Windows 7 taskbar icon to flash with a yellow color.

I tried so far:

Answer 1

As proposed by Kate, I used taskbar progress like this:

XAML:

cs:

taskBarItem.ProgressState = System.Windows.Shell.TaskbarItemProgressState.Indeterminate;

This makes the taskbar icon blink in green, which was good enough for my use case to get the users attention to a long running application.