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           DIGITAL


           Cover Letter for Application Developer's Package for C/C++ Version
           1.0

           24-July-1996

           Thank you for your interest in the Application Developer's Package
           for C/C++ Version 1.0. This product helps you to create three-
           tier client/server applications for deployment on PCs, Windows NT
           systems, and OpenVMS systems.

           Kit Contents

           This product consists of the following components:

           o  The Application Developer's Package for C/C++ User's Guide in
              HTML and PostScript format.

           o  The sample application in source code. This application demon-
              strates the tools and middleware that you can use to develop
              three-tier client/server applications on Windows NT and OpenVMS
              Alpha systems.

           o  A white paper entitled Things to Consider When Moving to a
              Client/Server Environment.

           Middleware and Tools

           A variety of tools and middleware exist for both Windows NT and
           OpenVMS that you can use to create client/server applications. The
           Application Developer's Package for C/C++ User's Guide describes
           the following products and how they can be used in a client/server
           environment:

           o  DEC C/C++

           o  DECset

           o  DEC Reliable Transaction Router (DEC RTR)

           o  OpenVMS Distributed Computing Environment (DCE)

           o  ObjectBroker

           o  DECmessageQ

           o  ACMSxp

           o  Digital TCP/IP Services for OpenVMS

           o  Sockets

           o  Wind/U APIs (from Bristol Technology)

           In addition, the Application Developer's Package provides C/C++
           source code illustrating the development of the sample application
           using three middleware tools: Distributed Computing Environment,
           ObjectBroker, and Sockets.


                                           NOTE

              These products are not delivered as part of the Application
              Developer's Package but can be purchased separately from
              Digital or from third parties.

           Distribution

           The Application Developer's Package for C/C++ Version 1.0 kit and
           documentation is being distributed through the following channels:

           o  On the Software Products Library (formerly ConDist)

           o  On the World Wide Web at the following URL:

                 http://www.openvms.digital.com/openvms/products/appdevpkg/

           License Information

           The Application Developer's Package for C/C++ User's Guide and
           sample application do not require the purchase of a separate li-
           cense to install or use. The terms and conditions for the use of
           this product are displayed at the beginning of the installation
           procedure.

           Installing on OpenVMS Alpha

           The Application Developer's Package for C/C++ Version 1.0 kit
           is distributed as a single file which is installed using Digi-
           tal's POLYCENTER Software Installation utility on an OpenVMS Alpha
           system. The name of the kit is:

                  DEC-VMS-APPDEV-V0100--1.PCSI

           To install this product, invoke the POLYCENTER Software Installa-
           tion utility using the following command:

                  $ PRODUCT INSTALL /BASE=VMS /HELP /SOURCE=ddcu:[dir] APPDEV

           For ddcu:[dir] specify the device name and directory that contains
           the kit.

           The installation requires approximately 4400 blocks of free disk
           space on the OpenVMS system disk. The installation procedure cre-
           ates the following directories:

           o  SYS$SYSROOT:[SYSHLP.EXAMPLES.APPDEV]

              Contains the documentation in HTML and PostScript formats,
              a license text file, and a ZIP file called APPDEVNT.ZIP for
              Windows NT installation.

           o  SYS$SYSROOT:[SYSHLP.EXAMPLES.APPDEV.COMMON]

              Contains sources common to all middleware implementations.

           o  SYS$SYSROOT:[SYSHLP.EXAMPLES.APPDEV.GUI]

              Contains sources for the GUI client application.


                                            2

           o  SYS$SYSROOT:[SYSHLP.EXAMPLES.APPDEV.NOM]

              Contains sources for the implementation without middleware.

           o  SYS$SYSROOT:[SYSHLP.EXAMPLES.APPDEV.RPC]

              Contains sources for the RPC sample application.

           o  SYS$SYSROOT:[SYSHLP.EXAMPLES.APPDEV.OBB]

              Contains sources for the ObjectBroker sample application.

           o  SYS$SYSROOT:[SYSHLP.EXAMPLES.APPDEV.SOCKETS]

              Contains sources for the Sockets sample application.

           Installing on Windows NT

           The ZIP file, APPDEVNT.ZIP, contains the Application Developer's
           Package for C/C++ User's Guide and sample application sources.
           Copy the ZIP file to a local directory on a Windows NT system,
           then unpack it using an unzip utility. Use the -d option to the
           unzip utility to preserve the directory structure. For example,
           you can use the following command:

                  pkunzip -d appdevnt.zip

           The installation requires approximately 1.7 megabytes of free disk
           space. The installation procedure creates the following directo-
           ries:

           o  ..\appdev

              Contains the documentation in HTML and PostScript formats, and
              a license text file.

           o  ..\appdev\common

              Contains sources common to all middleware implementations.

           o  ..\appdev\gui

              Contains sources for the GUI client application.

           o  ..\appdev\nom

              Contains sources for the implementation without middleware.

           o  ..\appdev\rpc

              Contains sources for the RPC sample application.

           o  ..\appdev\obb

              Contains sources for the ObjectBroker sample application.

           o  ..\appdev\sockets

              Contains sources for the Sockets sample application.


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           Getting Started

           To get started using the Application Developer's Package for C
           /C++, see the Application Developer's Package for C/C++ User's
           Guide and the white paper entitled Things to Consider When Moving
           to a Client/Server Environment. These documents are available in
           both HTML and PostScript versions.

           To view the HTML documentation for the Application Developer's
           Package for C/C++, start your browser and open the file APPDEV.HTM
           located in the following directories:

           OpenVMS        SYS$COMMON:[SYSHLP.EXAMPLES.APPDEV]

           Windows NT     ..\appdev

           The PostScript versions of these documents are available in the
           same directories under the following filenames:

           ADP_UG.PS      Application Developer's Package for C/C++ User's
                          Guide

           CS_PAPER.PS    Things to Consider When Moving to a Client/Server
                          Environment








































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