Visual Foxpro 2.5 (VFP2.5) 简体中文版 of DOS

README.TXT ********************************************************** Release Notes for Microsoft(R) FoxPro(R) for MS-DOS (R) Version 2.5b (C)1993 Microsoft Corporation. All Rights Reserved. Information in the FoxPro online Help is more current than information in the printed documentation. This README provides information not contained in the FoxPro online help or documentation, and provides corrections to both. ********************************************************** ======== CONTENTS ======== Part Description ---- ----------- 1 Installation 2 WAIT...WINDOW Enhancements 3 New Commands and Functions 4 New Transporter and Screen Directives 5 International and Cross-Platform Recommendations ---------------------------------------------------------- ==================== Part 1: Installation ==================== There are three types of installation for FoxPro for MS-DOS: Normal Installation, Administrative Installation and Workstation Installation. Instructions for Normal Installation are in the FoxPro Installation and Configuration manual. For information about Administrative and Workstation Installation, see INSTALL.TXT on FoxPro for MS-DOS Disk 1. ---------------------------------------------------------- ================================ Part 2: WAIT WINDOW Enhancements ================================ WAIT WINDOW now supports multiple line messages. Use a carriage return (CHR(13)) to move portions of your message to additional lines. The message window is automatically expanded to accommodate additional lines. For example, this command creates a message window that contains two lines: WAIT WINDOW "This is the 1st line" + CHR(13) + ; "This is the 2nd line" The width of the message window is adjusted to fit the longest line in the message. All lines in the message are left justified in the message window. Line feeds (CHR(10)) following CHR(13) are ignored. ---------------------------------------------------------- ================================== Part 3: New Commands and Functions ================================== Several new commands and functions are added to FoxPro 2.5b. For additional information about these commands and functions, see the "International and Cross Platform Recommendations" section below and the corresponding topics in Help. New Commands ------------ SET NOCPTRANS SET COLLATE New Functions ------------- CPCURRENT( ) CPDBF( ) CPCONVERT( ) IDXCOLLATE( ) ---------------------------------------------------------- ============================================= Part 4: New Transporter and Screen Directives ============================================= Several new Transporter and screen directives have been added. The #DOSOBJ, #MACOBJ, #UNIXOBJ and #WINOBJ Transporter directives allow you to transport objects created in the Screen Builder and Report Writer to specific FoxPro platforms. For additional information about these Transporter directives, see the Transporting Files topic in Help. #TRAN SNIPPET ONLY, a new screen directive, is available in FoxPro 2.5b. This screen directive affects how screen objects are transported, and is not discussed in Help. #TRAN SNIPPET ONLY is designed to limit the Transporter's changes to just screen snippets, and is placed in a screen's Setup snippet. When screen objects are transported to a different FoxPro platform, only the screen snippets for updated screen objects are transported if #TRAN SNIPPET ONLY is included. All other screen object attributes are not transported to the different platform. Note that #TRAN SNIPPET ONLY only affects updated screen objects; it does not affect new or unchanged screen objects or screen objects being transported for the first time. ---------------------------------------------------------- ========================================================= Part 5: International and Cross Platform Recommendations ========================================================= *** IMPORTANT *** ******************************************************* * Be sure to read this section completely before you * * change code pages or collation sequences! * ******************************************************* Overview of topics 1 FoxPro Collation Sequences 2 Case-Insensitive Collation Sequences 3 Case-Sensitive Collation Sequences 4 How do the SEEK and SKIP commands work? 5 Alternatives to SEEK and SKIP 6 Additional Recommendations 7 New Code Pages 8 CPZERO Program 9 Corrections to the Help File FoxPro 2.5b gives international developers and users powerful new features for handling accented characters across different FoxPro platforms, and provides accurate sorting in many languages. For international FoxPro users, this section describes how code pages and collation sequences affect sorting, seeking and comparisons using the SORT and SEEK commands, and also provides recommendations for taking advantage of these features. U.S. FoxPro users whose applications don't contain accented characters may not need any of the new international 2.5b features. In this case, you can disregard this section of the README and the International/X-Platform topic in Help. FoxPro 2.5b is 100% percent compatible with FoxPro 2.5. 1 FoxPro Collation Sequences ---------------------------- With a MACHINE collation sequence, which earlier FoxPro versions use (and to which FoxPro 2.5b still defaults), each character in the code page, whether it's a Roman character, an accented character, or a line-drawing character, has a unique "sort weight" determined by its position in the code page. In a majority of code pages, all accented characters appear after the unaccented characters. In this situation an � sorts after z, which isn't correct in most languages (although it is true in Swedish, for instance). Furthermore, in most languages accented characters sort after their unaccented counterparts, but only if the unaccented versions of all characters being compared are the same. For example, in German, � sorts after the unaccented a, but the string �a sorts before the string ab because the second character a is less than the second character b. In this way, characters are interleaved in many cultures. FoxPro 2.5b supports a number of new collation sequences to correctly sort in many languages. These sequences take into account all the complex rules of the language (including two-to-one, three-to-one and one-to-two mappings). The following collation sequences were available when this README was created. The code pages for which these collation sequences are defined are also included. Collation Sequence Friendly Name Code Pages ------------------ ------------- ---------- CZECH Czech 852, 895, 1250 DUTCH Dutch 437, 850, 1252 GREEK Greek 737, 1253 GENERAL General 437, 620, 850, 852, 861, 865, 895, 1250, 1252, 10000 HUNGARY Hungarian 852, 1250 ICELAND Icelandic 437, 850, 861, 1252 MACHINE Machine All NORDAN Norwegian/Danish 437, 850, 865, 1252 POLISH Polish 620, 852, 1250 RUSSIAN Russian 866, 1251 SLOVAK Slovak 852, 895, 1250 SPANISH Spanish 437, 850, 1252 SWEFIN Swedish/Finnish 437, 850, 1252 UNIQWT Unique Weight 437, 850, 1252,