title: add items to an already existing combobox cell in a datagridview comboBox column
body: <p>How can I add items to an already existing combobox cell in a datagridview combobox column. ProductGrid is dataGridView.</p>
  
  <pre><code>       With ProductGrid
           Dim objSerialNumber As New DataGridViewTextBoxColumn
          With objSerialNumber
              .Name = "SerialNumber"
              .HeaderText = "SerialNumber"
              .Visible = False
              .Width = lGridWidth * 1.2
          End With
          .Columns.Add(objSerialNumber)
         End With
  </code></pre>
  
  <p>There is another function where i have to add items in SerialNumber comboBox. And item that i have to add is in array. And which line of code will be used to remove items from comboBox if already added in ComboBox column.</p>