FGAPI void FGAPIENTRY glutInitContextFuncUcall( void (* callback)( void* ), void* user_data );
FGAPI void FGAPIENTRY glutAppStatusFuncUcall( void (* callback)( int, void* ), void* user_data );
FGAPI void FGAPIENTRY glutInitContextFuncUcall( void (* callback)( void* ), void* user_data );
FGAPI void FGAPIENTRY glutAppStatusFuncUcall( void (* callback)( int, void* ), void* user_data );