I need a control that is like the normal windows combobox, except
that for each item in the list the color for the background an forecolor differs, e.g.
Each Item has the same size (width, height)

ITEM 0      backcolour=red, forecolor=white
---------   
ITEM 1      backcolor=black forecolor=white
---------
ITEM 2      backcolor=blue,  forecolour=white
---------

ITEM 3      backcolor=green, forecolour=black

Thank you very much for the help.

Hi!
 I want to  draw the char to the cell by the Graphics. First i set the string to the cell ,second i draw the string by handling the CellPaint Event.
 the code is in the following.

 this.radGridView.EnbleCustomDrawing = true;       

this.radGridView.Rows[1].cells[1] = "+++++-----";    

private void radGridView1_CellPaint(object sender, GridViewCellPaintEventArgs e)
        {
            string content = e.Cell.Value as string;            
            if (string.IsNullOrEmpty(content))
            {
                return;
            }
            SolidBrush solidBrush = new SolidBrush(Color.Blue);
            int x = e.Cell.Bounds.Right - content.Length * 6 - 7;
            int y = e.Cell.Bounds.Y + 2;
            if (e.Cell.ColumnIndex != 1) return;            
            foreach (char ch in content)
            {               
                    solidBrush.Color = ch == '+' ? Color.Green : Color.Blue;
                    e.Graphics.DrawString(
                        ch.ToString()
                        , e.Cell.Font
                        , solidBrush
                        , x
                        , y);          

                x += 6;
            }
In the result, i get the double string in the cell!
 I want to diplay one string that i draw  in the cell.
I'd like to konw how to get my purpose! 
Regards