MFC截图程序的实现（四）

前面几篇文章介绍了如何进行窗口截图并保存至剪切板，现在将完整的代码贴出来：

主要是两个文件：( 完整源代码：http://download.csdn.net/detail/wwkaven/7487915 )

// 123Dlg.cpp : implementation file
//#include "stdafx.h"
#include "123.h"
#include "123Dlg.h"#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endifHWND My123Hwnd;
HWND cutWnd;/
// CMy123Dlg dialogCMy123Dlg::CMy123Dlg(CWnd* pParent /*=NULL*/): CDialog(CMy123Dlg::IDD, pParent)
{//{{AFX_DATA_INIT(CMy123Dlg)// NOTE: the ClassWizard will add member initialization here//}}AFX_DATA_INIT// Note that LoadIcon does not require a subsequent DestroyIcon in Win32m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}void CMy123Dlg::DoDataExchange(CDataExchange* pDX)
{CDialog::DoDataExchange(pDX);//{{AFX_DATA_MAP(CMy123Dlg)// NOTE: the ClassWizard will add DDX and DDV calls here//}}AFX_DATA_MAP
}BEGIN_MESSAGE_MAP(CMy123Dlg, CDialog)//{{AFX_MSG_MAP(CMy123Dlg)ON_WM_PAINT()ON_WM_QUERYDRAGICON()ON_WM_TIMER()//}}AFX_MSG_MAP
END_MESSAGE_MAP()/
// CMy123Dlg message handlersBOOL CMy123Dlg::OnInitDialog()
{CDialog::OnInitDialog();// Set the icon for this dialog.  The framework does this automatically//  when the application's main window is not a dialogSetIcon(m_hIcon, TRUE);          // Set big iconSetIcon(m_hIcon, FALSE);     // Set small icon// TODO: Add extra initialization herem_pic.SubclassDlgItem(IDC_PIC,this);  // 关联控件My123Hwnd = m_hWnd;  // 赋值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 CMy123Dlg::OnPaint()
{if (IsIconic()){CPaintDC dc(this); // device context for paintingSendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);// Center icon in client rectangleint 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 icondc.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 CMy123Dlg::OnQueryDragIcon()
{return (HCURSOR) m_hIcon;
}void CMy123Dlg::OnTimer(UINT nIDEvent)
{// TODO: Add your message handler code here and/or call defaultif (1 == nIDEvent) {POINT pnt;RECT rc;HWND DeskHwnd = ::GetDesktopWindow(); //取得桌面句柄HDC DeskDC = ::GetWindowDC(DeskHwnd); //取得桌面设备场景int oldRop2 = SetROP2(DeskDC, R2_NOTXORPEN);::GetCursorPos(&pnt); //取得鼠标坐标HWND UnHwnd = ::WindowFromPoint(pnt) ; //取得鼠标指针处窗口句柄::GetWindowRect(UnHwnd, &rc); //获得窗口矩形cutWnd = UnHwnd;if( rc.left < 0 ) rc.left = 0;if (rc.top < 0 ) rc.top = 0;HPEN newPen = ::CreatePen(PS_SOLID, 3, RGB(255, 0, 0)); //建立新画笔,载入DeskDCHGDIOBJ oldPen = ::SelectObject(DeskDC, newPen);::Rectangle(DeskDC, rc.left, rc.top, rc.right, rc.bottom); //在窗口周围显示闪烁矩形Sleep(400); //设置闪烁时间间隔::Rectangle( DeskDC, rc.left, rc.top, rc.right, rc.bottom);::SetROP2(DeskDC, oldRop2);::SelectObject( DeskDC, oldPen);::DeleteObject(newPen);::ReleaseDC( DeskHwnd, DeskDC);DeskDC = NULL;}if (2 == nIDEvent) {if (m_pic.GetIsFinshed()) {CopyBitmapToClipboard(FromHandle(cutWnd), TRUE);}}CDialog::OnTimer(nIDEvent);
}void CMy123Dlg::CopyBitmapToClipboard(CWnd *wnd, BOOL FullWnd)
{CDC *dc;if(FullWnd){ /* 抓取整个窗口*/dc = new CWindowDC(wnd);}      else{ /* 仅抓取客户区时*/dc = new CClientDC(wnd);} CDC memDC;memDC.CreateCompatibleDC(dc);CBitmap bm;CRect r;if(FullWnd)wnd->GetWindowRect(&r);elsewnd->GetClientRect(&r);CString s;wnd->GetWindowText(s);CSize sz(r.Width(), r.Height());bm.CreateCompatibleBitmap(dc, sz.cx, sz.cy);CBitmap * oldbm = memDC.SelectObject(&bm);memDC.BitBlt(0, 0, sz.cx, sz.cy, dc, 0, 0, SRCCOPY);//直接调用OpenClipboard()，而不用wnd->GetParent()->OpenClipboard();wnd->OpenClipboard();::EmptyClipboard();::SetClipboardData(CF_BITMAP, bm.m_hObject);CloseClipboard();//恢复原始环境memDC.SelectObject(oldbm);bm.Detach();  delete dc;KillTimer(2);// 加一句提示MessageBox(_T("复制完成"));}

// MyPic.cpp : implementation file
//#include "stdafx.h"
#include "123.h"
#include "MyPic.h"#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif/
// CMyPicCMyPic::CMyPic()
{
}CMyPic::~CMyPic()
{
}BEGIN_MESSAGE_MAP(CMyPic, CStatic)//{{AFX_MSG_MAP(CMyPic)ON_WM_LBUTTONDOWN()ON_WM_LBUTTONUP()//}}AFX_MSG_MAP
END_MESSAGE_MAP()/
// CMyPic message handlersvoid CMyPic::OnLButtonDown(UINT nFlags, CPoint point)
{// TODO: Add your message handler code here and/or call defaultSetCapture(); // 鼠标捕获HCURSOR hc = LoadCursor(AfxGetApp()->m_hInstance, MAKEINTRESOURCE (IDC_CURSOR1)); //IDC_CURSOR1是靶形光标资源号::SetCursor(hc);HICON hicon2 = LoadIcon(AfxGetApp()->m_hInstance, MAKEINTRESOURCE (IDI_ICON2)); //IDI_ICON2为无靶图标资源号this->SetIcon(hicon2);FromHandle(My123Hwnd)->SetTimer(1,600,NULL);IsFinshed = false;CStatic::OnLButtonDown(nFlags, point);
}void CMyPic::OnLButtonUp(UINT nFlags, CPoint point)
{// TODO: Add your message handler code here and/or call defaultReleaseCapture(); //释放鼠标捕获HICON hicon1 = LoadIcon(AfxGetApp()->m_hInstance, MAKEINTRESOURCE (IDI_ICON1)); //IDI_ICON1是有靶图标资源号this->SetIcon(hicon1);IsFinshed = true;FromHandle(My123Hwnd)->KillTimer(1);FromHandle(My123Hwnd)->SetTimer(2, 600, NULL);CStatic::OnLButtonUp(nFlags, point);
}bool CMyPic::GetIsFinshed()
{return IsFinshed;
}

但是，完成后效果并不是很好，因为win7Aero特效的原因，有些窗口截图失败，Ctrl + V后是一块黑，或是背景为一块黑，见图：

正常应该是这样的：

当然，大部分窗口是正常的：

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