Creating a new Registery Key with a default string value - c++

Question

What I am ultimately trying to do is either add an entirely new subkey with a name called "XtraFileLogging" with some default value, currently it's "NOTHING!!!", or I want to extract the value from the subkey named "XtraFileLogging".
Why am I having to call SetValue after a call to SetKeyValue when trying to add an entirely new subkey?
The following code works but it seems like I am using an extra step with a call to SetValue seeing as how SetKeyValue does the following https://msdn.microsoft.com/en-us/library/e2ey539x.aspx
CRegKey oRegKey;
bool setKeyWorked = false;
if (oRegKey.Open(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\EXTRA\\PROG2\\CONFIG")) == ERROR_SUCCESS)
{
LPCTSTR keyName = _T("XtraFileLogging");
LPCTSTR keysValue = _T("NOTHING!!!");
if (oRegKey.SetKeyValue(keyName, keysValue) == ERROR_SUCCESS)
{
setKeyWorked = true;
if (oRegKey.SetValue(keysValue, keyName) == ERROR_SUCCESS)
{
setKeyWorked = true;
}
else
{
setKeyWorked = false;
}
}
}
oRegKey.Close();
Why is it when i try either of the following SetKeyValue statements without the extra call to SetValue that the key doesn't show up?
if (oRegKey.SetKeyValue(keyName, keysValue) == ERROR_SUCCESS)
{
setKeyWorked = true;
}
Or
if (oRegKey.SetKeyValue(keyName, keysValue, keyName) == ERROR_SUCCESS)
{
setKeyWorked = true;
}
I even attach to the process and debug it and every time I can see that setKeyWorked is equal to true. Unfortunately without the extra call to SetValue afterwards the key never ends up getting created which I verified using regedit.