c++ accessing a msaccess db 2003 with c++ vs2003

when the system gets to this line the
hr = dbDataSource.OpenFromInitializationString(lpcOleConnect);
this is my connection string
-      lpcOleConnect      0x00430860 "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\c++ tree view\new files\DB\TreeView.mdb;User Id=admin;Password=;"      unsigned short*
but will not connect. have not done this before so this is all new to me and have no working examples to have a look at
any help would be appreciaed


// This is the main project file for VC++ application project
// generated using an Application Wizard.

#include "stdafx.h"
#include  <atldbcli.h>
#include  <atldbsch.h>
#include <ostream>
#include <iostream>
#include <string>
#include <wtypes.h>


#using <mscorlib.dll>


using namespace System;
using namespace std;

int _tmain()
{
    // TODO: Please replace the sample code below with your own.
    HRESULT hr = 0;
    std::string str;
    int i=0, ret=0;
  //  std::string query;
      
      
      string DAM;
      LPCOLESTR lpcOleConnect = L"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\c++ tree view\\new files\\DB\\TreeView.mdb;User Id=admin;Password=;";

                  // To initialize the connection to a database using an OLE DB provider,
            // two ATL classes are needed: CDataSource and CSession.
            CDataSource dbDataSource;
            CSession dbSession;

            // Uses ATL's string conversion macros to convert between character encodings.
            USES_CONVERSION;

            // Open the connection and initialize the data source specified by the passed
            // initialization string.
// **************************************************************************************************
//******************  falls over here
            hr = dbDataSource.OpenFromInitializationString(lpcOleConnect);
            if (FAILED(hr))
            {
                  cout<<DAM<<": Unable to connect to data source "<<OLE2T(lpcOleConnect)<<endl;
            }
      //      else
      //      {
                  hr = dbSession.Open(dbDataSource);
//                  if (FAILED(hr))
//                  {
      //                  cout<<DAM<<": Couldn't create session on data source "<<OLE2T(lpcOleConnect)<<endl;
//                  }
//                  else
//                  {
                        CComVariant var;
                        hr = dbDataSource.GetProperty(DBPROPSET_DATASOURCEINFO, DBPROP_DATASOURCENAME, &var);
//                        if (FAILED(hr) || (var.vt == VT_EMPTY))
//                        {
//                              cout<<DAM<<": No Data Source Name Specified."<<endl;
//                        }
//                        else
//                        {
//                              cout<<DAM<<": Successfully connected to database. Data source name:\n  "
//                                    <<COLE2T(var.bstrVal)<<endl;
                       
                              // Prepare SQL query.
                              LPCOLESTR query = L"SELECT ParentTable.ParentId, ParentTable.ParentName FROM ParentTable;";
//                              cout<<DAM<<": SQL query:\n  "<<OLE2T(query)<<endl;

                              // Excecute the query and create a record set.
                              CCommand<CDynamicStringAccessor> cmd;
                              hr = cmd.Open(dbSession, query);
                              DBORDINAL colCount = cmd.GetColumnCount();
//                              if (SUCCEEDED(hr) && 0 < colCount)
//                              {
//                                    cout<<DAM<<": Retrieve schema info for the given result set: "<<endl;
                                    DBORDINAL cColumns;
                                    DBCOLUMNINFO* rgInfo = NULL;
                                    OLECHAR* pStringsBuffer = NULL;
                                    cmd.GetColumnInfo(&cColumns, &rgInfo, &pStringsBuffer);
                                    for (int col=0; col < (int)colCount; col++)
                                    {
                                          cout<<" | "<<OLE2T(rgInfo[col].pwszName);
                                    }
                                    cout<<endl;

//                                    cout<<DAM<<": Fetch the actual data: "<<endl;
                                    int rowCount = 0;
                                    CRowset<CDynamicStringAccessor>* pRS = (CRowset<CDynamicStringAccessor>*)&cmd;
                                    // Loop through the rows in the result set.
                                    while (pRS->MoveNext() == S_OK)
                                    {
                                          for (int col=1; col <= (int)colCount; col++)
                                          {
                                                CHAR* szValue = cmd.GetString(col);
                                                cout<<" | "<<szValue;
                                          }
                                          cout<<endl;
                                          rowCount++;
                                    }
//                                    cout<<DAM<<": Total Row Count: "<<rowCount<<endl;
                              //}                  
                              //else
                              //{
//                                    cout<<DAM<<": Error: Number of fields in the result set is 0."<<endl;
                              //}
//                        }  
//                  }
      //      }

            dbDataSource.Close();
            dbSession.Close();
//            cout<<DAM<<": Cleanup. Done."<<endl;



      return 0;
}
sydneyguyAsked:
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Nick67Commented:
Provider=Microsoft.ACE.OLEDB.12.0
That's a provider for an accdb file used by Access 2007+
msaccess db 2003
If it is an mdb file, you need the JET provider string.

https://www.connectionstrings.com/microsoft-jet-ole-db-4-0/

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sydneyguyAuthor Commented:
spot on good set of eyes

      LPCOLESTR lpcOleConnect = L"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\\c++ tree view\\new files\\DB\\TreeView.mdb;User Id=admin;;Password=;";

access the DB nbow i just have to return the information
thanks for the help
sydneyguyAuthor Commented:
worked brillaint thenks
Nick67Commented:
No problem.
The other solution would be to use
TreeView.accdb
instead of TreeView.mdb -- but I suspect that VS generated the file, so leaving that alone and getting the provider string right was the much better choice anyway!

Nick67
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