In the Unicode programming model, you can define a wide-character version of the main function. Use wmain instead of main if you want to write portable code that adheres to the Unicode programming model.
wmain( int argc, wchar_t *argv[ ], wchar_t *envp[ ] )
You declare formal parameters to wmain using a similar format to main. You can then pass wide-character arguments and, optionally, a wide-character environment pointer to the program. The
envp parameters to wmain are of type
wchar_t*. For example:
If your program uses a main function, the multibyte-character environment is created by the run-time library at program startup. A wide-character copy of the environment is created only when needed (for example, by a call to the
_wputenv functions). On the first call to
_wputenv, or on the first call to
_wgetenv if an MBCS environment already exists, a corresponding wide-character string environment is created and is then pointed to by the
_wenviron global variable, which is a wide-character version of the
_environ global variable. At this point, two copies of the environment (MBCS and Unicode) exist simultaneously and are maintained by the operating system throughout the life of the program.
Similarly, if your program uses a wmain function, a wide-character environment is created at program startup and is pointed to by the
_wenviron global variable. An MBCS (ASCII) environment is created on the first call to
getenv, and is pointed to by the
_environ global variable.
For more information on the MBCS environment, see Internationalization in the Run-Time Library Reference.
END Microsoft Specific
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