Windows Forms Splitter
Divide and conquer the user interface to give users total control over the layout of their workspace in Windows Forms. You can subdivide, resize, and even collapse content panes.
Your users can resize application panes in real time by sliding the splitter in either direction, subject to the size constraints you set.
Collapse / Restore
Users can instantly collapse or restore to the previous extent an application pane by using the splitter's collapse and restore buttons.
Orient your splitter horizontally or vertically within the window.
Full support for the Application Styling Framework™ means that your splitter will always fit in with your application's global look and feel.