How to drag and drop row in girdview ?

Hi, 
       I want to drag and drop row in same grid like reorder the row. Is it possible to without create custom control ?
Actually we have file names in each row, user want to merge the file based on drag and drop, So user from which place to which place drop the row, we will merge that two file and refresh in grid. So for this we want drag and drop function.

I tried RadGridView.AllowRowReorder property to true , but still cant drag and drop the row. This is page load code for bind data in grid.

Private Sub LoadData()
        ' Create a DataTable and define its structure
        Dim dataTable As New DataTable()
        dataTable.Columns.Add("ID", GetType(Integer))
        dataTable.Columns.Add("Name", GetType(String))
        dataTable.Columns.Add("Age", GetType(Integer))

        ' Add some rows to the DataTable
        dataTable.Rows.Add(1, "John Doe", 30)
        dataTable.Rows.Add(2, "Jane Smith", 25)
        dataTable.Rows.Add(3, "Sam Brown", 35)

        ' Bind the DataTable to the RadGridView
        RadGridView1.DataSource = dataTable
    End Sub

Pls provide sample code in vb,

Thanks and Regards
Aravind