#define UC_WIN 2 // Windows 'HexNumpad'
#define UC_BSD 3 // BSD (not implemented)
#define UC_WINC 4 // WinCompose https://github.com/samhocevar/wincompose
+#define UC_OSX_RALT 5 // Mac OS X using Right Alt key for Unicode Compose
#define UC_BSPC UC(0x0008)