Visual C++ equivalent of GCC's __attribute__ ((__packed__))

For some compilers, there is a packing specifier for structs, for example ::

RealView ARM compiler has "__packed"Gnu C Compiler has "__attribute__ ((__packed__))"Visual C++ has no equivalent, it only has the "#pragma pack(1)"

I need something that I can put into the struct definition.

Any info/hack/suggestion ? TIA...