C / C++ / MFC

// Note: A bitmap handle can only be attached to one
// bitmap object at a time. If it is attach to 2 bitmap
// objects at the same time it becomes invalid when the
// second bitmap object dettaches it. (Why?)!

{
    ...
    // Note: bmpBack is type CBitmap
    CExBitmap exBmp; // Note: CExBitmap is derived from CBitmap
    exBmp.Attach(bmpBack.GetSafeHandle());
    bResult = exBmp.function(...) [this == &exBmp]
    {
        ...
        CExBitmap bmpNew;
        {
            CWorkDC dcWork(NULL,this);
            if( !bmpNew.CreateCompatibleBitmap(
                &dcWork,newWidth,newHeight) )
            {
                return FALSE;
            }
        }

        // Copy this bitmap to new bitmap
        bmpNew.CopyBitmap(this);

        // Detach new handle from new bitmap object
        HGDIOBJ hNew = bmpNew.Detach();

        // Delete this bitmap
        DeleteObject();

        // Attach new handle to this bitmap
        Attach(hNew);
        ...
        return Result;
    }

    exBmp.Detach();
   // Accordng to MFC: hNew is now invalid (Why?)
   return Result;
}

{
    ...
    // Note: bmpBack is type CBitmap
    CExBitmap exBmp; // Note: CExBitmap is derived from CBitmap
    exBmp.Attach(bmpBack.Detach());
    bResult = exBmp.function(...)
    {
        ...
        CExBitmap bmpNew;
        {
            CWorkDC dcWork(NULL,this);
            if( !bmpNew.CreateCompatibleBitmap(
                &dcWork,newWidth,newHeight) )
            {
                return FALSE;
            }
        }

        // Copy this bitmap to new bitmap
        bmpNew.CopyBitmap(this);

        // Detach new handle from new bitmap object
        HGDIOBJ hNew = bmpNew.Detach();

        // Delete this bitmap
        DeleteObject();

        // Attach new handle to this bitmap
        Attach(hNew);
        ...
        return Result;
    }

    bmpBack.Attach(exBmp.Detach());
    // Accordng to MFC: hNew is now valid (Why?)
    return Result;
}

<br />
// bnDlg.cpp : implementation file<br />
//<br />
<br />
#include "stdafx.h"<br />
#include "bn.h"<br />
#include "bnDlg.h"<br />
#include "models.h"<br />
.....<br />
void CBnDlg::OnButton1() <br />
{<br />
	CModels model1;<br />
	model1.Add("jps", "C:\\belief.xbn", "C:\\error.log", ine_Default, recommendtype_Default);<br />
<br />
}

C:\Backup2\projects\bn\bnDlg.cpp(178) : error C2065: 'ine_Default' : undeclared identifier
C:\Backup2\projects\bn\bnDlg.cpp(178) : error C2065: 'recommendtype_Default' : undeclared identifier

 void __stdcall GetAccount(_clsAccount &Acct)<br />
{<br />
	HRESULT hr;<br />
	dbAccount dbAcct;<br />
<br />
	hr = CoInitialize(0);  //initializes COM library<br />
	if (SUCCEEDED(hr))<br />
	{<br />
		hr = CoCreateInstance( CLSID_clsAccount, <br />
			NULL, CLSCTX_INPROC_SERVER, IID__clsAccount, (void**) &Acct); <br />
<br />
		if(SUCCEEDED(hr))<br />
		{<br />
			if(dbAcct.Open())<br />
			{<br />
				_bstr_t bstr1(_T("This is the test string.")); //use constructor to enter string <br />
				Acct.put_AccountName(bstr1); ***********<br />
				//Acct->put_AccountName(bstr1);				//Acct->put_AccountName(BSTR __MIDL_0048)<br />
				dbAcct.Close();<br />
			}<br />
		}<br />
	CoUninitialize(); //Closes the COM library on the current apartment, <br />
					  //unloads all DLLs loaded by the apartment, frees <br />
					  //any other resources that the apartment maintains,<br />
	}<br />
}