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The CharToOem function translates a string into the OEM-defined character set. (OEM stands for original equipment manufacturer.) This function supersedes the AnsiToOem function.
BOOL CharToOem(
LPCTSTR lpszSrc, // pointer to string to translate
LPSTR lpszDst // pointer to translated string
);
Parameters
lpszSrc
Pointer to the null-terminated string to translate.
lpszDst
Pointer to the buffer for the translated string. If the CharToOem function is being used as an ANSI function, the string can be translated in place by setting the lpszDst parameter to the same address as the lpszSrc parameter. This cannot be done if CharToOem is being used as a wide-character function.
Return Values
The return value is always nonzero.
Функция определена в библиотеке windows.h