Another great and useful control by Marco Bellinaso. Place this control on a form to immediately achieve splitting capabilities. It works as a container control, and the controls you drop on it will be automatically resized when the end user moves the splitter bars. You can control the splitter bar’s size, color, and position, and programmatically assign controls to its two panes. The SplitBegin and SplitComplete events inform you when the drag operation begins and ends, so your code can do any additional processing as required. Get the source code.