'__fastcall' incompatible with the '/com+' switch: converting to '__stdcall'
The __fastcall function-calling convention cannot be used with the /com+ compiler option. The compiler ignores the calls to __fastcall. To resolve the warning, either remove the calls to __fastcall or compile without /com+. The following sample generates C4561:
void __fastcall Func(void *p); // C4561, remove __fastcall to resolve void main() { }