I was helping a friend today doing some over-the-shoulder code review and suggestions for his Windows app he's writing for the store. In doing this I asked a question about how to perform a certain action. He indicated that he put those functions in the AppBar and was it not obvious I was supposed to use them. I looked at the AppBar again and found out why I wasn't drawn to them. First, the labels he used weren't descriptive to me and relied too much on me looking at the actual icon. Second, however, is that when I hovered over them I received no visual feedback I was expecting and immediately thought they were just disabled (the color was slightly gray as well which probably didn't help this).
I mentioned these to him and noted he should use the AppBarButtonStyle base definition that comes in the Visual Studio templates as a guide and just set the appropriate content. He proceeded to let me know that he received the vector data from Go to the complete details ...