pub unsafe extern "system" fn WideCharToMultiByte(
    codepage: u32,
    dwflags: u32,
    lpwidecharstr: *const u16,
    cchwidechar: i32,
    lpmultibytestr: *mut u8,
    cbmultibyte: i32,
    lpdefaultchar: *const u8,
    lpuseddefaultchar: *mut i32
) -> i32
🔬This is a nightly-only experimental API. (windows_c)