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The Windows SDK provides the WideCharToMultiByte function to convert a Unicode, or UTF-16, string (WCHAR*) to a character string (CHAR*) using a particular code page. Windows also provides the MultiByteToWideChar function to convert a character string from a particular code page to a Unicode string. These functions can be a bit daunting at first but unless you have a lot of legacy code or APIs to deal with you can just specify CP_UTF8 as the code page and these functions will convert between Unicode UTF-16 and UTF-8 formats. UTF-8 isn’t really a code page in the original sense but the API functions lives on and now provide support for UTF conversions.