I have a GridView:
<GridView HorizontalAlignment="Left" Width="400" Height="400" Header="AAAAAA">
<GridViewItem Content="GridViewItem" Margin="0"/>
<GridViewItem Content="GridViewItem" Margin="0"/>
<GridViewItem Content="GridViewItem" Margin="0"/>
<GridViewItem Content="GridViewItem" Margin="0"/>
<GridViewItem Content="GridViewItem" Margin="0"/>
<GridViewItem Content="GridViewItem" Margin="0"/>
<GridViewItem Content="GridViewItem" Margin="0"/>
<GridViewItem Content="GridViewItem" Margin="0"/>
<GridViewItem Content="GridViewItem" Margin="0"/>
<GridViewItem Content="GridViewItem" Margin="0"/>
<GridViewItem Content="GridViewItem" Margin="0"/>
<GridViewItem Content="GridViewItem" Margin="0"/>
<GridViewItem Content="GridViewItem" Margin="0"/>
<GridViewItem Content="GridViewItem" Margin="0"/>
<GridViewItem Content="GridViewItem" Margin="0"/>
<GridViewItem Content="GridViewItem" Margin="0"/>
<GridViewItem Content="GridViewItem" Margin="0"/>
<GridViewItem Content="GridViewItem" Margin="0"/>
<GridViewItem Content="GridViewItem" Margin="0"/>
<GridViewItem Content="GridViewItem" Margin="0"/>
</GridView>

I simply want that AAAAA on the upper side on the GridView, not the left where it intervene position of my GridViewItem. You know, like in Music apps on Windows 8, the title “now playing >” or “most popular >” are placed in the upper side of the GridView. How to do it?
Try this:
Alternatively, instead of using GridView’s Header, you could do something like this: