This module imports the structures and functions used with Shell Library.
A shell is an application that enables users to group, start,
and otherwise control other applications.
The most common shell operations involve selecting files,
opening files or running programs, dragging filenames to copy
or move files, and deleting files. A pointer-based interface serves
all such operations well. Therefore, the pen should behave as a pointer
in the shell. Tapping or dragging a rectangular marquee should select
files, double-tapping should open files, and dragging should copy
or move files. The shell can provide deletion services on selected
files either through a "delete" option in a menu or by handling a
For more info look the "Shell Library" in WIN32.HLP.