How to position ContextMenuStrip

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C#

I can't seem to figure out how to position my ContextMenuStrip below my dataGridViewCell. When I click the dataGridViewComboBoxCell I want my ContextMenuStrip to show right below the cell. Here's what I've done so far:

class MyDropDownList : DataGridViewComboBoxCell
{
   ContextMenuStrip dropDownList;

   public MyDropDownList()
   {
       dropDownList = new ContextMenuStrip();
       dropDownList.Items.Add("Hello World");
       dropDownList.Items.Add("Goodbye");
       dropDownList.Items.Add("Random stuff...");
   }

   protected override void OnMouseClick(DataGridViewCellMouseEventArgs e)
   {
       // ContextMenuStrip shows where the mouse
       // was clicked within the cell area...
       // I want the ContextMenuStrip to show 
       // right below the cell and to be aligned 
       // properly with the cell.

       dropDownList.Show(Cursor.Position.X, Cursor.Position.Y);

       // This wasn't even close!
       // dropDownList.Show(base.DataGridView.PointToScreen(e.Location));
   }
}

So basically I want the ContextMenuStrip to is act is my
DropDownList for the dataGridViewComboBoxCell