In the directories below this one you will find the following
Windows examples:

ALARM       -a clock program
DATACTL     -a demonstration of various types of dialog controls
EDIT        -a simple editor that demonstrates the use of
             an edit control
GENERIC     -a generic windows application
HELPEX      -a demonstration of the use of context sensitive help
ICONVIEW    -a program that lets you view .ico files
LIFE        -an entertaining game that demonstrates the use of bitmaps
             and common dialogs
SHOOTGAL    -a simple game
WATZEE      -another simple game

Below the directory that contains each example are the directories
where the examples are built. There are 3 build directories for
each example:

WIN32   -build a Win32 version of the example here for Windows NT or Win32s
WIN386  -build a 32-bit version of the example here that can be run under
         16-bit Windows using the Open Watcom Windows Supervisor.
WIN16   -build a 16-bit version of the example here to run under Windows 3.x.

In this directory is a file called win1632.h that contains several
useful macros that allow you to write code that can be compiled
for both the Win16 (Windows 3.x) and Win32 (Windows NT) API sets.

In addition to using these macros some code in the examples is
conditionally included using statements like:

#ifdef __NT__           /* for Win32 specific code */
#ifdef __WINDOWS_386__  /* for 32-bit Windows specific code */

There are some functions that are for the 32-bit windows environment
that are macroed away in other environments:

AllocAlias16 - gets a 16-bit far pointer to some 32-bit memory
                (just returns the pointer in 16-bit code)
    
FreeAlias16  - releases the 16-bit far pointer obtained by AllocAlias16
                (does nothing in 16-bit code)
    
GetProc16    - gets a special 16-bit thunk that points at 32-bit callbacks
                (just returns the callback address in 16-bit code)