Associates the specified registry entry with a specified member variable of type CString.
The registry key root.
The registry subkey.
The registry key.
The member variable to associate with the specified registry entry.
The size, in bytes, of the member variable.
This macro is used in conjunction with the BEGIN_RDX_MAP and END_RDX_MAP macros to associate a member variable with a given registry entry. The global function RegistryDataExchange, or the member function of the same name created by the BEGIN_RDX_MAP and END_RDX_MAP macros, should be used to perform exchange of data between the system registry and the member variables in the RDX map.