exampledlg.cpp

这几个都是相关的资料相对vc有声入的了解建议泉下下来。

// ExampleDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Example.h"
#include "ExampleDlg.h"

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

HBITMAP hBitmap;
/////////////////////////////////////////////////////////////////////////////
// CExampleDlg dialog

CExampleDlg::CExampleDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CExampleDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CExampleDlg)
		// 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 CExampleDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CExampleDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CExampleDlg, CDialog)
	//{{AFX_MSG_MAP(CExampleDlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BTN_COPYSCREEN, OnBtnCopyscreen)
	ON_BN_CLICKED(IDC_BTN_CLIPBOARD, OnBtnClipboard)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CExampleDlg message handlers

BOOL CExampleDlg::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 CExampleDlg::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 CExampleDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

HBITMAP CExampleDlg::CopyScrToBit(LPRECT lpRect)
{
	HDC       	hScrDC, hMemDC;      
	HBITMAP   hOldBitmap;   
	int       	nX, nY, nX2, nY2;      
	int       	nWidth, nHeight;      
	int       	xScrn, yScrn;         
	if (IsRectEmpty(lpRect))
		return NULL;
	hScrDC = CreateDC("DISPLAY", NULL, NULL, NULL);
	hMemDC = CreateCompatibleDC(hScrDC);
	nX = lpRect->left;
	nY = lpRect->top;
	nX2 = lpRect->right;
	nY2 = lpRect->bottom;
	xScrn = GetDeviceCaps(hScrDC, HORZRES);
	yScrn = GetDeviceCaps(hScrDC, VERTRES);
	if (nX < 0) 			nX = 0;
	if (nY < 0)			    nY = 0;
	if (nX2 > xScrn)		nX2 = xScrn;
	if (nY2 > yScrn)		nY2 = yScrn;
	nWidth = nX2 - nX;
	nHeight = nY2 - nY;
	hBitmap = CreateCompatibleBitmap(hScrDC, nWidth, nHeight);
	hOldBitmap = (HBITMAP)SelectObject(hMemDC, hBitmap);
	ShowWindow(SW_HIDE);
	BitBlt(hMemDC, 0, 0, nWidth, nHeight,hScrDC, nX, nY, SRCCOPY);
	hBitmap =(HBITMAP)SelectObject(hMemDC, hOldBitmap);
	DeleteDC(hScrDC);
	DeleteDC(hMemDC);
	ShowWindow(SW_SHOW);
	return hBitmap;
}

void CExampleDlg::OnBtnCopyscreen() 
{
	// TODO: Add your control notification handler code here
	CRect rc;
	GetDesktopWindow()->GetWindowRect(&rc);
	hBitmap=CopyScrToBit(&rc);
}

void CExampleDlg::OnBtnClipboard() 
{
	// TODO: Add your control notification handler code here
	if (OpenClipboard())
	{
		EmptyClipboard();
		SetClipboardData(CF_BITMAP, hBitmap);
		CloseClipboard();
	}
}