DLL export __stdcall without DEF file and decorated function names with VS

Question

1. If I have a DLL file...how can I see functions are built as __stdcall or __cdecl?
2. I want to create a DLL to export functions as __stdcall without DEF file and decorated function names with Visual Studio like:

__declspec(dllexport) int __stdcall TestFunktion(void)
{
  return 0;
}

The result looks like this:

Is there any easy way to create the functions without decoration without DEF file in Visual Studio?