Extensiones de Microsoft

asm-statement:
 __asmassembly-instruction;_opt
 __asm {assembly-instruction-list} ;_opt

assembly-instruction-list:
 assembly-instruction;_opt
 assembly-instruction;assembly-instruction-list;_opt

ms-modifier-list:
 ms-modifierms-modifier-list_opt

ms-modifier:
 __cdecl
 __fastcall
 __stdcall
 __syscall (reservado para futuras implementaciones)
 __oldcall (reservado para futuras implementaciones)
 __unaligned (reservado para futuras implementaciones)
 based-modifier

based-modifier:
 __based ( based-type )

based-type:
 name