C#

protected override void OnPaint(PaintEventArgs e)
    {
    e.Graphics.FillRectangle(Brushes.Green, e.ClipRectangle);
    }

"I would then add a Paint method to my ECG class, and hand it either e.Graphics so it can draw itself."

using System.Drawing;
using System.Windows.Forms;
public partial class ECGMachine
   {
   ...
   public void Paint(Graphics g)
      {
      g.FillRectangle(Brushes.Red, g.ClipBounds);
      }
   ...
   }

...
myECGMachineINstance.Paint(e.Graphics);
...

stephen.darling wrote:

manualy draw a panal object on the form

stephen.darling wrote:

how would I then "atach" the new panal to my control

Panel p = new Panel();
p.Location = pointIWantMyPanel;
p.Size = sizeIWantMyPanel;
Controls.Add(p);
MyECGDisplayControl myECG = new MyECGDisplayControl();
myECG.Location = pointIWantMyECG;
myECG.Size = sizeIWantMyECG;
p.Controls.Add(myECG);

<code>Dictionary<DateTime, bool> dates = new Dictionary<DateTime, bool>();
for(DateTime loop = Min(ranges); loop < Max(ranges); loop = loop.AddDays(1))
{
    dates.Add(loop, false);
}

for(int i = 0; i < ranges.count; i++)
{
    for(DateTime loop = ranges[i].Start; loop < ranges[i].End; loop = loop.AddDays(1))
    {
        dates[loop] = true;
    }
}