LCMapString函数
| MAP_UPPERCASE flag produces the same result as CharUpper in the locale. Likewise, the LCMAP_LOWERCASE flag produces the same result as CharLower. This function always maps a single character to a single character. Note that, in these cases, the function maps the lowercase I to the uppercase I, even when the current language is Tu***sh or Azeri. To change this for Tu***sh and Azeri, specify LCMAP_LINGUISTIC_CASING.
Note: When the ANSI version of this function is used with a Unicode-only LCID, the call can succeed because the system uses the system code page. However, characters that are undefined in the system code page appears in the string as a question mark (?). To determine which LCIDs are Unicode-only, see Table of Language Identifiers. If LCMAP_UPPERCASE or LCMAP_LOWERCASE is set and if LCMAP_SORTKEY is not set, the lpSrcStr and lpDestStr pointers can be the same. Otherwise, the lpSrcStr and lpDestStr pointers must not be the same. If they are the same, the function fails, and GetLastError returns ERROR_INVALID_PARAMETER. If the LCMAP_HIRAGANA flag is specified to map Katakana characters to Hiragana characters, and LCMAP_FULLWIDTH is not specified, the function only maps full-width characters to Hiragana. In this case, any half-width Katakana characters are placed as-is in the output string, with no mapping to Hiragana. An application must specify LCMAP_FULLWIDTH if it wants half-width Katakana characters mapped to Hiragana. Even if the Unicode version of this function is called, the output string is only in WCHAR or CHAR format if the string mapping mode of LCMapString is used. If the sort key generation mode is used, specified by LCMAP_SORTKEY, the output is an array of byte values. To compare sort keys, use a byte-by-byte comparison. An application can call the function with the NORM_IGNORENONSPACE and NORM_IGNORESYMBOLS flags set, and all other options flags cleared, in order to simply strip characters from the input string. If this is done with an input string that is not null-terminated, it is possible for LCMapString to return an empty string and not return an error. The LCMapString function ignores the Arabic Kashida. If an application calls the function to create a sort key for a string containing an Arabic Kashida, there will be no sort key value for the Kashida. The function treats the hyphen and apostrophe a bit differently than other punctuation symbols, so that words like coop and co-op stay together in a list. All punctuation symbols other than the hyphen and apostrophe sort before the alphanumeric characters. An application can change this behavior by setting the SORT_STRINGSORT flag. See CompareString for a more detailed discussion of this issue. When LCMapString is used to generate a sort key, by setting the LCMAP_SORTKEY flag, the sort key stored into *lpDestStr may contain an odd number of bytes. The LCMAP_BYTEREV option only reverses an even number of bytes. If both options are chosen, the last (odd-positioned) byte in t |
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