ATMLUtilitiesLibrary.UTRSFormUtilities.GetVisibleChildAtDesktopPoint C# (CSharp) Метод

        private static Control GetVisibleChildAtDesktopPoint( Control topControl, Point desktopPoint )
        {
            Control foundControl = topControl.GetChildAtPoint( topControl.PointToClient( desktopPoint ) );
            if (foundControl != null)
            {
                if (foundControl.HasChildren)
                {
                    foreach (Control control in foundControl.Controls)
                    {
                        foundControl = GetVisibleChildAtDesktopPoint(control, desktopPoint);
                        if (foundControl != null && foundControl.Visible)
                            break;
                    }
                }
            }
            return foundControl ?? topControl;
        }