Dim countryNameColumn As DataColumn = dataTable.Columns.Add("data", GetType(String))
dataTable.Rows.Add("One")
dataTable.Rows.Add("Two")
dataTable.Rows.Add("Three")
dataTable.Rows.Add("Four")
dataTable.Rows.Add("Five")
ComboBox1.DataSource = dataTable
ComboBox1.DisplayMember = "data"