C/C++ code
char szA[100]; //An ANSI string buffer
WCHAR szW[100]; //A Unicode string buffer
//Normal sprintf:all strings are ANSI
sprintf(szA, "%s","ANSI Str");
//Converts Unicode string to ANSI
sprintf(szA,"%S",L"Unicode Str");
//Normal swprintf:all strings are Unicode
swprintf(szW,L"%s",L"Unicode Str");
//Converts ANSI string to Unicode
swprintf(szW,L"%S", "ANSI Str");