how to add space between two columns in grdview?

Dear all,
I want to add space between 2 columns in gridview.

following is what i am doing
Dim space As New LiteralControl()
space.Text = "    "
  Dim fourth_value As String = space.Text + op(4)                         op(5) = space.Text + op(5)                         dt.Rows.Add(fourth_value)                         gv.DataSource = dt                         gv.DataBind()

the op shows t ...