Chapter 17 talks about Dynamic Link Libraries (DLLs). The
SIMPLE directory contains a simple DLL. The LTTEST and RTTEST
directories use this DLL in load-time and run-time modes.
The ENTRYPNT directory contains the same DLL found in SIMPLE,
except that the DLL in ENTRYPNT contains an entry-point
function.

To test the DLLs, take these steps:

  1) Compile the DLL in SIMPLE.

  2) Copy SND.LIB to LTTEST. 

  3) Compile the code in LTTEST.

  4) Run HONKER1.EXE in LTTEST. It will fail because the DLL
     is missing. Copy the SND.DLL file from SIMPLE to LTTEST
     and run HONKER1 again and it should run correctly.

  5) Compile the code in RTTEST. 

  6) Run HONKER2.EXE in RTTEST. It will fail because the DLL
     is missing. Copy the SND.DLL file from SIMPLE to RTTEST
     and run HONKER2 again and it should run correctly. Note
     that the code here fails differently from the code in
     LTTEST when the DLL is missing. See the book for details.

  7) Compile the DLL in ENTRYPNT. Copy SND.DLL to both 
     LTTEST and RTTEST and re-run HONKER1 and HONKER2. 
     You do not need to re-compile either HONKER1 or
     HONKER2 because the DLL has the same interface as
     the DLL in SIMPLE. When you run HONKER1 and HONKER2,
     note that the entry point function produces a dialog
     box. 

The DLL in the STACK directory is used in the discussion in
Section 17.7.