how X64 DLL project show "_Myfunc@4" use dependency walk analysis

how X64 DLL project show “_Myfunc@4” use dependency walk analysis

I have build a DLL project(C++) with visual studio.
Use dependency walk analysis.
Method names are distinct in x64 vs x86 versions
X86 is as “_Myfunc@4”,but X64 version is as “Myfunc”.
I want to change X64 version.
X64 verision can also show “_Myfunc@4”.
How can realise this?

Any help is appreciated.Thanks.

Best Regards
Zhou ChengJun