[Meaning] The name that follows specifies a Microsoft-specific storage-class attribute. [Used to Form Derived Types?] No [Keyword] 
__declspec
_ _ b a s e d
_ _ c d e c l
_ _ d e c l s p e c
_ _ f a s t c a l l
_ _ r e s t r i c t
_ _ s p t r
_ _ s t d c a l l
_ _ u p t r
_ _ w 6 4
_ _ u n a l i g n e d