Dear all
Hi

I am Saeed Amrollahi. I write C++ programs using VC++ 2005 CLR/CLI. I
have two problems:
1. How to declare/define and use global ref class objects? For example
for database connection/communication, I usually define a class called
DBBroker, When I used MFC, DBBrk wraped the Recordset/ODBC facilities
and now it wraps the ADO.Net facilities:

ref class DBBroker { // A wrapper class for all database manipulation
public:
    DBBroker();
    void Open();
    bool IsOpen();
    void SetQuery(const std::wstring&);
    void SetUpdQuery(const std::wstring&);
    void SetInsQuery(const std::wstring&);
    void Close();
    /*
    * Load functions
    */
    std::map<std::wstring, std::wstring> LoadSQLFilename();
    // ...
               /*
    * Get functions
    */
    int GetNextAvailInvestorId();
    // ...
    /*
    * Update functions
    */
    void UpdAccLogin();

    /*
    * Insert functions
    */
    void InsIndividual();

    ~DBBroker();
private:
    System::Data::OleDb::OleDbConnection^ Conn;
    System::Data::OleDb::OleDbCommand^ Command;
    System::Data::OleDb::OleDbDataAdapter^ Adapter;
};

Now I want to define one and only one global object:
DBBroker^ g_DBBrk = gcnew DBBroker();
At the moment, I have to define a DBBroker object for each form and
database operation and obviously, it is base practice.
2. As you know, If I have the following native C++ class:
class C {
public:
 C& f();
 C& g();
};

then, I can write the following code:
C c;
c.f().g();
How to use the method chaining inside a ref class:
public ref class SingleInvestorRegForm : public
System::Windows::Forms::Form
{
public:
  SingleInvestorRegForm^ FillNationalityComboBox();
  SingleInvestorRegForm^ FillSexComboBox();
};

FillNationalityComboBox()->FillSexComboBox(); // or something like
that

Thanks in advance,

Regards,
S. Amrollahi