namespace System.Windows.Forms { public class SplitterEventArgs : EventArgs { public int X { get; } public int Y { get; } public int SplitX { get; set; } public int SplitY { get; set; } public SplitterEventArgs(int x, int y, int splitX, int splitY) { X = x; Y = y; SplitX = splitX; SplitY = splitY; } } public delegate void SplitterEventHandler(object sender, SplitterEventArgs e); }