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:

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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;

};

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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