79 lines
4.9 KiB
HTML
79 lines
4.9 KiB
HTML
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<meta name="abstract" content="Generic applications allow maximum portability because the same source code can be compiled for OEM, ANSI, and Unicode." />
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<title>Write a generic iSeries Access for Windows application</title>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Write a generic iSeries Access for Windows application</h1>
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<div><p>Generic applications allow maximum portability because the same
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source code can be compiled for OEM, ANSI, and Unicode.</p>
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<div class="section"><p>Generic applications are built by specifying different preprocessor
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definitions, and by using the generic version of the iSeries™ access for Windows<sup>®</sup> APIs
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(the ones without the "A" or "W" suffixes). Following is a short list of guidelines
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for writing a generic application: </p>
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<ul><li>Instead of including the usual <string.h> for manipulating strings,
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include <TCHAR.H>.</li>
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<li>Use generic data types for characters and strings. Use 'TCHAR' for 'char'
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in your source code.</li>
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<li>Use the _TEXT macro for literal characters and strings. For example, <samp class="codeph">TCHAR
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A[]=_TEXT("A Generic String")</samp>.</li>
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<li>Use generic string manipulation functions. For example, use <samp class="codeph">_tcscpy</samp> instead
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of <samp class="codeph">strcpy</samp>.</li>
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<li>Be especially careful when using the 'sizeof' operator - always remember
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that a Unicode character occupies two bytes. When determining the number of
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characters in a generic TCHAR array A, instead of the simple <samp class="codeph">sizeof(A)</samp>,
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use <samp class="codeph">sizeof(A)/sizeof(TCHAR)</samp>.</li>
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<li>Use proper preprocessor definitions for compilation. When compiling your
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source for Unicode in Visual C++, you should also use the preprocessor definitions <samp class="codeph">UNICODE</samp> and <samp class="codeph">_UNICODE</samp>.
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Instead of defining <samp class="codeph">_UNICODE</samp> in the MAK file, you may want
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to define it at the beginning of your source code as: <pre>#ifdef UNICODE
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#define _UNICODE
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#endif</pre>
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</li>
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</ul>
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</div>
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<div class="section"><p>For a complete description of these guidelines, see the following
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resources:</p>
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</div>
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<div class="section"> <ol><li>Richter, J. <em>Advanced Windows: The Developer's Guide to the
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Win32 API for Windows NT<sup>®</sup> 3.5 and Windows 95</em>, Microsoft<sup>®</sup> Press,
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Redmond, WA, 1995.</li>
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<li>Kano, Nadine <em>Developing International Software for Windows 95
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and Windows
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NT<sup>®</sup>: a handbook for software design</em>, Microsoft Press, Redmond, WA, 1995.</li>
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<li>Microsoft <a href="http://support.microsoft.com/support/" target="_blank">Knowledge
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Base</a><img src="www.gif" alt="Link outside Information Center" /> articles</li>
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<li><a href="http://msdn.microsoft.com/library/default.asp" target="_blank">MSDN Library</a><img src="www.gif" alt="Link outside Information Center" /></li>
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</ol>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaikcaexpressprogstd.htm" title="Most of the iSeries Access for Windows C/C++ APIs that accept string parameters exist in three forms: OEM, ANSI, or Unicode.">OEM, ANSI, and Unicode considerations</a></div>
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</div>
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</div>
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</body>
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