_tmain()是个宏？什么是宏，
经常听到宏，但到底什么是宏，_tmain()是个宏？又是什么意思。。。请用通俗简洁的语言说明下，谢谢。。。
[解决办法]
用A等价替换B
[解决办法]
VS IDE中，在不明白的符号上点鼠标右键，选转到定义。
[解决办法]
#ifdef _WINMAIN_
/*
* Skip past program name (first token in command line).
* Check for and handle quoted program name.
*/
#ifdef WPRFLAG
lpszCommandLine = (wchar_t *)_wcmdln;
#else /* WPRFLAG */
lpszCommandLine = (unsigned char *)_acmdln;
#endif /* WPRFLAG */
while (*lpszCommandLine > SPACECHAR
[解决办法]
(*lpszCommandLine&&inDoubleQuote)) {
/*
* Flip the count from 1 to 0 or 0 to 1 if current character
* is DOUBLEQUOTE
*/
if (*lpszCommandLine==DQUOTECHAR) inDoubleQuote=!inDoubleQuote;
#ifdef _MBCS
if (_ismbblead(*lpszCommandLine)) {
if (lpszCommandLine) {
lpszCommandLine++;
}
}
#endif /* _MBCS */
++lpszCommandLine;
}
/*
* Skip past any white space preceeding the second token.
*/
while (*lpszCommandLine && (*lpszCommandLine <= SPACECHAR)) {
lpszCommandLine++;
}
#ifdef WPRFLAG
mainret = wWinMain(
#else /* WPRFLAG */
mainret = WinMain(
#endif /* WPRFLAG */
(HINSTANCE)&__ImageBase,
NULL,
lpszCommandLine,
showWindowMode
);
#else /* _WINMAIN_ */
#ifdef WPRFLAG
__winitenv = envp;
mainret = wmain(argc, argv, envp);
#else /* WPRFLAG */
__initenv = envp;
mainret = main(argc, argv, envp);
#endif /* WPRFLAG */
