typedef void (* FGCBPassive )( int, int );
typedef void (* FGCBEntry )( int );
typedef void (* FGCBWindowStatus )( int );
-typedef void (* FGCBSelect )( int, int, int );
typedef void (* FGCBJoystick )( unsigned int, int, int, int );
typedef void (* FGCBOverlayDisplay)( void );
typedef void (* FGCBSpaceMotion )( int, int, int );