Im getting crazy with it. It is so easy in windows form, but in wpf it seems to be different. Every example i find is in C# and i cant addapt it. Well, this is the code i have. Atm, i have just defined the columns:
 'diseño de las columnas
        Dim item As ListViewItem = New ListViewItem
        Dim Mi_Lista As GridView = New GridView
        Mi_Lista.AllowsColumnReorder = True
        Dim cine As New GridViewColumn()
        Dim Si3d As New GridViewColumn
        cine.Header = "Cine"
        cine.DisplayMemberBinding = New Binding("Cine")
        Si3d.DisplayMemberBinding = New Binding("si3D")
        cine.Width = 140
        Si3d.Header = "3D"
        Si3d.Width = 50
        Mi_Lista.Columns.Add(cine)
        Mi_Lista.Columns.Add(Si3d)
Thanks in advance.