Hello Community

I am using C++ to create a small programm using the GroupWise-Admin-API.
Now my question is if there is a list of possible ErrorCodes of the
different APICalls.
For example i want to create a new user so i call
IADUsers::AddExistingUser(). It returns an HRESULT which i can test of
failure.... But i want to know why it failed :) ....

Greets Alex