Basically I needed a nice animated callout that could also take some content.

This seems to be the exact role of the standard WPF Popup primitive, so I thought I’ll just use that and tweak it a bit. And about 30 minutes later, I have a nice callout popup which animates in using the standard Popup PopupAnimation enumeration.

The only thing is that the Width and Height and direction of the callout are hardcoded in the attached example, but if you were so inclined I am sure you could alter that.

Any way here is the callout popup in action (nice drop shadow, no?)
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