C#

private int left = 0;
private int top = 0;

private void Form1_KeyDown(object sender, KeyEventArgs e)
{
    switch (e.KeyData)
    {
        default :
            break;
        case Keys.Up :
            top -= 1;
            break;
        case Keys.Down :
            top += 1;
            break;
        case Keys.Left :
            left -= 1;
            break;
        case Keys.Right :
            left += 1;
            break;
    }

    DrawIt();
}

private void DrawIt()
{
    Bitmap b1 = new Bitmap(10, 10);
    Graphics g = Graphics.FromImage(b1);
    g.FillRectangle(new SolidBrush(Color.White), new Rectangle(new Point(0, 0), b1.Size));

    Bitmap b2 = new Bitmap(this.Width, this.Height);
    g = Graphics.FromImage(b2);
    g.DrawImage(b1,new Point(left,top));
    this.BackgroundImage = b2;
    this.Invalidate();
}

arachnoid wrote:

i'm worried that i now have a superclass that knows too much about its subclasses

arachnoid wrote:

is it asking for trouble

int asteriskPosition = strValue.IndexOf("*");