How to get control under mouse cursor? [duplicate]

Answer 1

// This getYoungestChildUnderMouse(Control) method will recursively navigate a       
// control tree and return the deepest non-container control found under the cursor.
// It will return null if there is no control under the mouse (the mouse is off the
// form, or in an empty area of the form).
// For example, this statement would output the name of the control under the mouse
// pointer (assuming it is in some method of Windows.Form class):
// 
// Console.Writeline(ControlNavigatorHelper.getYoungestChildUnderMouseControl(this).Name);


    public class ControlNavigationHelper
    {
        public static Control getYoungestChildUnderMouse(Control topControl)
        {
            return ControlNavigationHelper.getYoungestChildAtDesktopPoint(topControl, System.Windows.Forms.Cursor.Position);
        }

        private static Control getYoungestChildAtDesktopPoint(Control topControl, System.Drawing.Point desktopPoint)
        {
            Control foundControl = topControl.GetChildAtPoint(topControl.PointToClient(desktopPoint));
            if ((foundControl != null) && (foundControl.HasChildren))
                return getYoungestChildAtDesktopPoint(foundControl, desktopPoint);
            else
                return foundControl;
        }
    }