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-
- Feb 1, 1994
- ************************************************************************
-
- PACKWIN (tm) Version 1.0
-
- DOS and Windows Executable File Compressor
-
- ************************************************************************
-
- Copyright (c) 1993-1994 by Yellow Rose Workgroup. All Rights Reserved.
-
- PACKWIN compresses Microsoft DOS and Windows programs, to dramatically
- reduce their size. Programs compressed by PACKWIN are functionally
- identical to the originals, only smaller. For example, consider the
- 422k "Setup" that is bundled with MS-Windows 3.1. PACKWIN compresses
- this file to less than 250k, or 59% of its original size. The smaller,
- more efficient programs save disk space, LAN overhead, disk caching
- resources and discourage reverse engineering.
-
- PACKWIN inputs a big program and outputs a small one. The process is
- totally automatic and requires no additional drivers and no modifica-
- tion to source code or linking.
-
-
- How to use PACKWIN
- ------------------
-
- PACKWIN can run on MS-DOS or Microsoft Windows environment. You can
- think of PACKWIN compression process as a "black box": files go in big
- and come out small.
-
- There are three steps to compressing a file:
-
- (1) Specify the file to be compressed. The file type must be a DOS
- executable file with "EXE" or "COM" file extension, or a Windows
- 3.1 executable file with the "EXE" or "DLL" file extension.
-
- (2) Specify the compression options. Several compression options allow
- you to get extra compression out of some executable files.
-
- (3) Start the compression. This stage may take a long time with large
- executable files, but loading time is short.
-
- After these steps, you have a compressed executable. The uncompressed
- file has been renamed with the filename extension "OLD."
-
- The compression algorithm used by PACKWIN is the standard public domain
- LZ method.
-
-
-
- Compression Options
- -------------------
-
- Before the file is compressed, you have several compression options
- that can be used to get extra compression. The default compression
- options automatically selected by PACKWIN should suffice for most
- applications.
-
- There are some options:
-
- (1) Disable compress bitmap resources. Bitmaps typically yield the
- best overall compression in the executable.
-
- (2) Disable Compress other system resources. This option helps the
- compression. The "other" resources include: Menus,Dialog boxes,
- String Tables, and others. The resource types not included are
- the types that provide status information to external programs,
- such as version info resources and icons.
-
- (3) Disable compress winstub program.
-
- (4) Only compress Microsoft Windows Applications.
-
- (5) Only compress MS-DOS Applications.
-
-
-
- Files that can't be compressed
- ------------------------------
-
- Although the PACKWIN technology successfully compresses the over-
- whelming majority of programs without difficulty, some programs are
- not good candidates for compression.
-
- The best strategy is to compress the file and then see if the packed
- file loads up. If it don't work, it cann't be compressed, you would
- delete it and restore this file from "OLD" file.
-
- Factors that disqualify compression:
-
- o Files must be DOS or Windows 3.1 executable files. Files that
- are not "New Executable" files, such as Windows NT "Portable
- Executables" cannot be compressed.
-
- o Files cannot access their own disk file image. If you need to
- store data, don't store it in your EXE image.
-
- o Files cannot have a proprietary file format. Since PACKWIN
- relies on the standard Windows file format, it can't compress
- a file that has a proprietary or self-loading format. This
- includes files that are already compressed by PACKWIN.
-
- Files cannot contain symbolic debugging information. If symbolic
- debugging information is detected, PACKWIN will not proceed with
- compression. This is a useful feature, since you know that programs
- compressed with PACKWIN do not aid and abet reverse engineering of
- your technology.
-
-
-
- Benefits of registration
- ------------------------
-
- PACKWIN is Shareware, and if you use PACKWIN regularly we strongly
- encourage you to register it. With registration you will receive
- the latest version of the software, a comprehensive printed manual,
- one free upgrade of PACKWIN, an optional Authenticity Verification
- Name and Serial Number.
-
- Also included in the registered version are several utility programs
- not provided in the Shareware version.
-
-
-
- Copyright Issues
- ----------------
-
- Modification of a copyrighted work require authorization from the
- copyright holder.
-
- For more information, please contact us.
-
- Mr. Lei Jun
- 4/F 22 Zhichun Rd.
- Haidian, Beijing
- P.R.China, 100088
-
- Tel: (86)-1-2049624
- Fax: (86)-1-2061869
-
- * * * * *