public Bitmap GetChoiceBox(int w)
{
Bitmap result = new Bitmap(252, 14);
using (Graphics g = Graphics.FromImage(result))
{
g.Clear(Color.White);
g.DrawRectangle(Pens.Blue, new Rectangle(0, 0, 251, 13));
g.DrawRectangle(Pens.Red, new Rectangle(0, 0, w + 1, 13));
}
return result;
}