private void form_MouseWheel(object sender, MouseEventArgs e) { if (Control.ModifierKeys.HasFlag(Keys.Control) && Form.Mode == RegionCaptureMode.Annotation) { if (e.Delta > 0) { CurrentTool = CurrentTool.Previous <ShapeType>(); } else if (e.Delta < 0) { CurrentTool = CurrentTool.Next <ShapeType>(); } } else { if (e.Delta > 0) { Options.MagnifierPixelCount = Math.Min(Options.MagnifierPixelCount + 2, RegionCaptureOptions.MagnifierPixelCountMaximum); } else if (e.Delta < 0) { Options.MagnifierPixelCount = Math.Max(Options.MagnifierPixelCount - 2, RegionCaptureOptions.MagnifierPixelCountMinimum); } } }