Microsoft suggests putting all the commands in the bottom appbar, I want to display a popup menu for detail command when my mouse hover on the button of the appbar, and after mouse move from the button, the popup menu disappears. After searching for a long time, still don't find a solution, anyone can help?
You should use Context menu control
But Windows 8 is also system for tablet's and touch devices so event OnMouseOver is not good way. Better handle the Right Click Event.