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I've been looking at the command line generated by Visual Studio, and for one of my project it defines two symbols: _UNICODE and UNICODE. Now if I understand this document this rather old document, the _UNICODE symbol is a VC++ thing that causes certain standard functions to use wchar_t instead of char in their interfaces.
But what does the UNICODE without an underscore mean?
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In text processing, Unicode takes the role of providing a unique code point—a number, not a glyph—for each character. In other words, Unicode represents a character in an abstract way and leaves the visual rendering (size, shape, font, or style) to other software, such as a web browser or word processor.
you can go to project properties --> configuration properties --> General -->Project default and there change the "Character set" from "Unicode" to "Not set".
Raymond Chen explains it here: TEXT vs. _TEXT vs. _T, and UNICODE vs. _UNICODE:
The plain versions without the underscore affect the character set the Windows header files treat as default. So if you define
UNICODE, thenGetWindowTextwill map toGetWindowTextWinstead ofGetWindowTextA, for example. Similarly, theTEXTmacro will map toL"..."instead of"...".The versions with the underscore affect the character set the C runtime header files treat as default. So if you define
_UNICODE, then_tcslenwill map towcsleninstead ofstrlen, for example. Similarly, the_TEXTmacro will map toL"..."instead of"...".
Looking into Windows SDK you will find things like this:
#ifdef _UNICODE #ifndef UNICODE #define UNICODE #endif #endif If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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