유니코드 파일저장

EF BB BF     UTF-8
FE FF          UTF-16/UCS-2, little endian windows
FF FE          UTF-16/UCS-2, big endian
FF FE 00 00  UFT-32/UCS-4, little endian
00 00 FE FF  UFT-32/UCS-4, big-endian

EX)

USHORT Test_Short = 0xfeff;

CString Test_String="";

Test_String.Format(L"%d", Test_Num);

WriteFile(hFile, &Test_Short, 2, &dwNumWrite, NULL);

WriteFile(hFile, Test_String, lstrlen(test)*2, &dwNumWrite, NULL);