Compiler Error C3368
'function declaration' : invalid calling convention for IDL
You can only use the __stdcall or __cdecl calling conventions in an .idl file.
The following sample generates C3368:
// C3368.cpp
// processor: x86
[idl_module(name="Name", dllname="Some.dll")];
[idl_module(name="Name")]
int __fastcall f1(); // C3368