DataGrid and TreeGrid examples

ID	First Name	Last Name	Home Phone	Cell Phone

Id column is neither resizable nor reorderable and has a tooltip in header.
First Name column is not reorderable, has different initial, maximal and minimal width and has a tooltip in header.
Last Name column has custom css class.
Home Phone and Cell Phone columns are not resizable and have custom initial size.
Home Phone column has a custom css class