[SFML] Wyświetlanie tekstu - błąd przy kompilacji

1>------ Build started: Project: Sprawdzenie, Configuration: Debug Win32 ------
1>  main.cpp
1>main.cpp(3): error C3083: 'Unicode': the symbol to the left of a '::' must be a type
1>main.cpp(13): error C2664: 'sf::Text::Text(const sf::Text &)' : cannot convert parameter 1 from 'std::wstring' to 'const sf::Text &'
1>          Reason: cannot convert from 'std::wstring' to 'const sf::Text'
1>          No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called
1>main.cpp(20): error C2039: 'LoadFromFile' : is not a member of 'sf::Font'
1>          C:\Users\Matcin\Documents\Visual Studio 2010\bib\SFML-2.0\include\SFML/Graphics/Font.hpp(51) : see declaration of 'sf::Font'
1>main.cpp(22): error C2039: 'IsOpened' : is not a member of 'sf::RenderWindow'
1>          C:\Users\Matcin\Documents\Visual Studio 2010\bib\SFML-2.0\include\SFML/Graphics/RenderWindow.hpp(44) : see declaration of 'sf::RenderWindow'
1>main.cpp(22): fatal error C1903: unable to recover from previous error(s); stopping compilation
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========