Simple Newbie question about accessing a Variable out of a class of a class

Hi

After compiling "Hello World", I am on the way to code a shared
library - but now I have some trouble. I have a class which is holding
a Database connection. In this class there are other classes holding
data from sql statements. For now I cannot access the connection
object in the classes of the "connectonholding"-class, which is what I
need.

Here I paste my code and marked the sentence where the problem is,
probably you can better imagine what I want.

Thanks for your Help!
Christian Maier

//foo.h
#include <pqxx/pqxx>

using namespace PGSTD;
using namespace pqxx;

typedef long long llong;
class FiMi
{
  public:
    void setDB(string);
    void setHost(string);
    void setPort(string);
    void setUser(string);
    void setPasswd(string);
    void setSchema(string);
    void doConnect();
    void doDisconnect();
    connection * getConnection;
  private:
    string db;
    string host;
    string port;
    string user;
    string passwd;
    string schema;
    string connectionstring;
    connection dbCon(string);

  public:
    class fProvider
    // I must have access to the connection object
    {
      public:
        long long getProvider(string); //from
caption
        void getAllProviders(string[]);
        void getAllProviderTypes(string[]);
        long long getProvideType(string); //from
caption
        void addProvider(string,long long, string); //caption,
ptype_id, additional
        void delProvider(long long); //via
provider_id
        void updProvider(long long); //via
provider_id
    };
};

//foo.cpp
#include <pqxx/pqxx>
#include "foo.h"
using namespace PGSTD;
using namespace pqxx;

typedef long long llong;
void FiMi::doConnect()
{

     connectionstring = "dbname=" + db + " " +
                        "host=" + host + " " +
                        "port=" + port + " " +
                        "user=" + user + " " +
                        "password=" + passwd;

    try
     {
       cout << "ich bin hier " + connectionstring + " \n";
       connection dbCon(connectionstring);
       cout << "connected to " << dbCon.dbname() << " \n";

       //probably I want to use the connection from client code for
native sqls ....
       getConnection = &dbCon;
     }
     catch (const broken_connection &e)
     {
       cout << "beim verbinen ist folgender fehler passiert:\n";
       throw logic_error( e.what() );
     }

};

llong FiMi::fProvider::getProvider(string caption)
{
    try
     {
       /* ####################### HERE IS WHAT I NEED
###########################
           THE dbCon Object is no access habe her which is what i
need, how to do this
           cout << dbCon.Database << endl;

######################################################################
*/
       return 0;
     }
     catch (const sql_error &e)
     {
        cerr << "SQL error: " << e.what() << endl
             << "Query was: '" << e.query() << "'" << endl;
        return -1;
     }
};

int main( int argc, char *argv[] )
    {
        FiMi a;
        return 0;
}