public void StartDrawing(DrawingItem obj)
{
nStep = 0;
curDrawing = obj.Clone();
if (formHS != null)
{
curDrawing.ConvertToScreen(formHS.Location);
}
curDrawing.StartDesign();
saveTransform();
sHelp = curDrawing.Help();
this.Invalidate();
this.Capture = true;
}
