SDL_EnableUNICODE - Enable UNICODE translation
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