What is the name for this component?

[neofibril]

Some applications have vertical divider that partitions objects.
This divider is similar to that of an HTML frameset, and provides for horizontal resizing.
The difference is that resizing happens after mouseup, instead of being a live-resize.

When the mouse is moved over the divider, a col-risize cursor is shown.
When the mouse button is depressed, a checkered bitmap - the same size as the divider - is positioned under the cursor.
When the mouse is moved, while still depressed, the bitmap follows the mouse.
When the mouse button is released, the bitmap disappears, and the panel moves to that point, resizing the objects on either side.

What is it called?

[neofibril]

Splitter Windows (http://www.catch22.org.uk/tuts/splitter.asp)
CSplitterWnd (Visual C++ 6.0) (http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vcmfc98/html/_mfc_csplitterwnd.asp)
Windows Forms Splitter Control (http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbcon/html/vbconsplittercontroloverview.asp)

[Mhtml]

The catch-22 tutorial is an excellent tutorial for the most part, but there are quite a few code errors.

[neofibril]

I shall keep that in mind. Thank you.