WideCharToMultiByte
时间: 2024-05-10 21:20:06 浏览: 9
WideCharToMultiByte is a Windows API function that converts a Unicode string (represented in UTF-16 encoding) to a multi-byte string (represented in a specified code page). This function is commonly used in Windows programming to support internationalization and localization of software applications.
The function signature is as follows:
```c++
int WideCharToMultiByte(
UINT CodePage,
DWORD dwFlags,
LPCWSTR lpWideCharStr,
int cchWideChar,
LPSTR lpMultiByteStr,
int cbMultiByte,
LPCSTR lpDefaultChar,
LPBOOL lpUsedDefaultChar
);
```
The parameters are:
- `CodePage`: The code page to use for the conversion.
- `dwFlags`: Optional flags that control the behavior of the function.
- `lpWideCharStr`: The Unicode string to convert.
- `cchWideChar`: The number of characters in the Unicode string, or -1 if the string is null-terminated.
- `lpMultiByteStr`: The buffer to receive the converted multi-byte string.
- `cbMultiByte`: The size of the buffer in bytes.
- `lpDefaultChar`: The default character to use for characters that cannot be represented in the specified code page.
- `lpUsedDefaultChar`: A pointer to a flag that indicates whether the function used the default character.
The function returns the number of bytes written to the output buffer, or 0 if an error occurred. Possible error codes include ERROR_INSUFFICIENT_BUFFER, indicating that the output buffer is too small, and ERROR_INVALID_PARAMETER, indicating that one of the input parameters is invalid.
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