2024年4月26日发(作者：)

字符集转换（Character set conversion）

Unicode and character set functions

Recently my Unicode has been engaged in a while ago and wanted

to see MSDN it scorched by the flames! English looks really hard,

in order to save time, translation summary, for future

reference. English level is limited. If there is any

discrepancy, please refer to MSDN.

The first is the wide character to multi byte character

conversion function, and the function prototype is as follows:

Int WideCharToMultiByte (...

UINT CodePage,

DWORD dwFlags,

LPCWSTR lpWideCharStr,

Int cchWideChar,

LPSTR lpMultiByteStr,

Int cbMultiByte,

LPCSTR lpDefaultChar,

LPBOOL lpUsedDefaultChar

);

This function converts a wide string to a specified new string,

such as ANSI, UTF8, etc., and the new string does not have to

be a multi byte character set. Parameter:

CodePage: Specifies the character set code page to be converted

to. It can be any set of characters already installed or brought

with the system. You can also use one of the code pages as shown

below.

CP_ACP current system ANSI code page

CP_MACCP current system Macintosh code page

CP_OEMCP the current system OEM code page, a hardware scan code

for the original device manufacturer

CP_SYMBOL Symbol code page for Windows 2000 and later, I don't

understand what it is

CP_THREAD_ACP the current thread ANSI code page for Windows

2000 and later. I don't understand what it is

CP_UTF7 UTF-7, when setting this value, both lpDefaultChar and

lpUsedDefaultChar must be NULL

CP_UTF8 UTF-8, when setting this value, both lpDefaultChar and

lpUsedDefaultChar must be NULL

I think the most common should be CP_ACP and CP_UTF8. The former

converts wide characters to ANSI, and the latter to UTF8.