* Create a new system window specifying the width, the height and its title.
* Returns handle to this window.
* Returns window height.
* Returns window title.
* Returns window width.
* Returns true if window is in fullscreen mode.
* Resize the current frame buffer of the window. * Returns reference to this so it can be used in a stream.
* Enter or leave fullscreen mode. * Returns reference to this so it can be used in a stream.
* Set window title. * Returns reference to this so it can be used in a stream.
* Returns true if window should close.
* Swap between window fullscreen and windowed mode.
* It represents an OS window.