use3dlg.cpp

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// Use3Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "Use3.h"
#include "Use3Dlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CUse3Dlg dialog

CUse3Dlg::CUse3Dlg(CWnd* pParent /*=NULL*/)
	: CDialog(CUse3Dlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CUse3Dlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CUse3Dlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CUse3Dlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CUse3Dlg, CDialog)
	//{{AFX_MSG_MAP(CUse3Dlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON6, OnButton6)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CUse3Dlg message handlers

BOOL CUse3Dlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CUse3Dlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CUse3Dlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

#include <atlbase.h>
#include "..\Simple1\simple1.h"
#include "..\Simple1\Simple1_i.c"

void CUse3Dlg::OnButton6()		// 智能指针的释放
{
	::CoInitialize( NULL );		//如果在这里初始化，则要注意智能指针的释放

	CComQIPtr < IFun, &IID_IFun > spFun;

	HRESULT hr = spFun.CoCreateInstance( CLSID_Fun );
	ASSERT( SUCCEEDED( hr ) );
	// 为简单起见，不再用if判断HRESULT了。并且不再对IFun::Add()调用举例

	CComBSTR s1( "Hello" ), s2( " world" ), s3;
	hr = spFun->Cat( s1, s2, &s3 );
	ASSERT( SUCCEEDED( hr ) );
	CString sMsg( s3 );
	AfxMessageBox( sMsg );

//	spFun->Release();	// 大错特错！！！！！
	spFun.Release();	// 正解

	::CoUninitialize();
}