The clipboard is a structure maintained by Windows that can contain information
which is to be copied within or between applications. The clipboard 'knows' the
format of the data that it contains, so a text editor will not accidentally
paste data of another format (e.g. an image) into its contents. By convention,
the clipboard is accessed as a direct response to controls with names such as
'paste', 'cut', 'copy'. It is extremely anti-social to use the clipboard in any
other way, as users learn to rely on the contents of the clipboard remaining
unchanged unless they explicitly alter them.