registry_delete_value() questions

I want to delete a value in a key that I created if you are wondering what I want to do.

I am not getting this. I have this code...

Code:

extern "C" __declspec(dllexport) __stdcall LPSTR hr_reg_delete_value(LPSTR arg0, LPSTR arg1);

extern "C" __declspec(dllexport) __stdcall LPSTR hr_reg_delete_value(LPSTR arg0, LPSTR arg1)

{
       LPSTR result = "test";
       HKEY test;
       
       RegOpenKeyEx(HKEY_CURRENT_USER,arg0,0,NULL,&test);

       RegDeleteValue(test,arg1);

       return result;

};

I am really not sure what I am doing. I able to delete a whole key with registry_delete_key() but I can't figure this one out.

SHDeleteKey