#include "SDL.h"
int SDL_EnableUNICODE(int enable);
Enables/Disables Unicode keyboard translation.
To obtain the character codes corresponding to received keyboard events, Unicode translation must first be turned on using this function. The translation incurs a slight overhead for each keyboard event and is therefore disabled by default. For each subsequently received key down event, the unicode member of the SDL_keysym structure will then contain the corresponding character code, or zero for keysyms that do not correspond to any character code.
A value of 1 for enable enables Unicode translation; 0 disables it, and -1 leaves it unchanged (useful for querying the current translation mode).
Note that only key press events will be translated, not release events.
Returns the previous translation mode (0 or 1).
SDL_keysym