/// <summary>
/// Mark areas by drag with multiple border widths and colors.
/// </summary>
/// <param name="eventHandler">Event handler.</param>
/// <param name="keys">Keys.</param>
/// <param name="n">Number of targets.</param>
/// <param name="borderWidths">Border widths.</param>
/// <param name="borderColors">Border colors.</param>
public static void MarkByDrag(TargetMarkEventHandler eventHandler, Keys[] keys = null, int n = 1, int[] borderWidths = null, Color[] borderColors = null)
{
TargetMarkerByDrag.Mark(keys, n, eventHandler, borderWidths, borderColors);
}
/// <summary>
/// Update targets.
/// This method must be called in the GUI thread.
/// </summary>
public static void UpdateTargets()
{
TargetMarkerByArea.UpdateTargets();
TargetMarkerByDrag.UpdateTargets();
}