怎样制作一个自己的网站,住房和城乡建设部政务服务门户官网,苏州企业网站制作开发,宁夏住房和城乡建设厅网站首页VC编程中20种各种编程技巧和方法 1. 如何激活当前屏幕保护程序 2. 如何禁止/启用屏幕保护及电源管理 3. 如何激活和关闭IE浏览器 4. 如何给树控件加入工具提示 5. 如何获取系统信息框的路径 6. 如何直接运行一个资源中的程序 7. 如何遍历整个目录 8. 如…VC编程中20种各种编程技巧和方法 1. 如何激活当前屏幕保护程序 2. 如何禁止/启用屏幕保护及电源管理 3. 如何激活和关闭IE浏览器 4. 如何给树控件加入工具提示 5. 如何获取系统信息框的路径 6. 如何直接运行一个资源中的程序 7. 如何遍历整个目录 8. 如何禁止/启用系统热键 9. 如何隐藏/显示WINDOWS系统任务栏 10. 如何实现窗口到系统区图标间的动画效果 11. 如何判断当前操作系统的版本 12. 如何在指定矩形框内水平/垂直显示多行文字 13. 如何在指定矩形中旋转显示文字 14. 如何将32 x 32像素图标转换为16 x 16像素值的图标 15. 如何建立一个灰度级图标 16. 如何按指定角度旋转显示内存位图(用法和BitBlt类似) 17. 如何将指定的窗体以位图形式复制到系统剪切板上 18. 如何替换HBITMAP中的颜色值 19. 如何转换并保存位图 20. 如何获取局域网上计算机名及它们的IP地址 1. 如何激活当前屏幕保护程序 // 激活当前屏幕保护程序, jingzhou xu PostMessage(WM_SYSCOMMAND,SC_SCREENSAVE,0); 2. 如何禁止/启用屏幕保护及电源管理 static UINT dss_GetList[] {SPI_GETLOWPOWERTIMEOUT, SPI_GETPOWEROFFTIMEOUT, S PI_GETSCREENSAVETIMEOUT}; static UINT dss_SetList[] {SPI_SETLOWPOWERTIMEOUT, SPI_SETPOWEROFFTIMEOUT, S PI_SETSCREENSAVETIMEOUT}; static const int dss_ListCount _countof(dss_GetList); l 禁止屏幕保护及电源管理 { m_pValue new int[dss_ListCount]; for (int x0;xdss_ListCount;x) { // 禁止屏幕保护及电源管理 VERIFY(SystemParametersInfo (dss_SetList[x], 0, NULL, 0)); } delete[] m_pValue; } l 启用屏幕保护及电源管理 { m_pValue new int[dss_ListCount]; for (int x0;xdss_ListCount;x) { //启用屏幕保护及电源管理 VERIFY(SystemParametersInfo (dss_SetList[x], m_pValue[x], NULL, 0)); } delete[] m_pValue; } 3. 如何激活和关闭IE浏览器 //激活并打开IE void lounchIE() { HWND hFindWindowEx(NULL,NULL,NULL, Microsoft Internet Explorer) ; ShellExecute(h,open,C:\simple.html, NULL,NULL,SW_SHOWNORMAL); } //关闭IE及其它应用 void CloseIE() { int appBSM_APPLICATIONS; unsigned long bsm_app(unsigned long )app; BroadcastSystemMessage(BSF_POSTMESSAGE,bsm_app, WM_CLOSE,NULL,NULL); } 4. 如何给树控件加入工具提示 l 首先给树控件加入TVS_INFOTIP属性风格如下所示 if (!m_ctrlTree.Create(WS_CHILD|WS_VISIBLE| TVS_HASLINES|TVS_HASBUTTONS|TVS_LINESATROOT|TVS_SHOWSELALWAYS|TVS_INFOTIP, //加入提示TVS_INFOTIPjingzhou xu(树控件ID:100) CRect(0, 0, 0, 0), m_wndTreeBar, 100)) { TRACE0(Failed to create instant bar child\n); return -1; } l 其次加入映射消息声明如下所示: afx_msg void OnGetInfoTip(NMHDR* pNMHDR,LRESULT* pResult); //树控件上加入 提示消息jingzhou xu ON_NOTIFY(TVN_GETINFOTIP, 100, OnGetInfoTip) //树控件条目上加 入提示jingzhou xu l 最后加入呼应涵数处理 void CCreateTreeDlg::OnGetInfoTip(NMHDR* pNMHDR, LRESULT* pResult) { *pResult 0; NMTVGETINFOTIP* pTVTipInfo (NMTVGETINFOTIP*)pNMHDR; LPARAM itemData (DWORD) pTVTipInfo-lParam; //对应每个条目的数据 HTREEITEM hItem pTVTipInfo-hItem; CString tip; HTREEITEM hRootItem m_chassisTree.GetRootItem(); if (hRootItem ! pTVTipInfo-hItem) { tip 树结点的提示; } else { tip 树根上的提示; } strcpy(pTVTipInfo-pszText, (LPCTSTR) tip); } 5. 如何获取系统信息框的路径 #include atlbase.h #define IDS_REG_KEY_MSINFO_PATH1 _T( Software\Microsoft\Shared Tools\MSInfo ) #define IDS_REG_KEY_MSINFO_PATH2 _T( Software\Microsoft\Shared Tools Location ) #define IDS_REG_VAL_MSINFO_PATH1 _T( Path ) #define IDS_REG_VAL_MSINFO_PATH2 _T( MSInfo ) #define IDS_MSINFO_EXE_NAME _T( MSInfo32.exe ) //... BOOL GetSysInfoPath( CString strPath ) { strPath.Empty(); LPTSTR pszPath strPath.GetBuffer( MAX_PATH ); CRegKey reg; DWORD dwSize MAX_PATH; LONG nRet reg.Open( HKEY_LOCAL_MACHINE, IDS_REG_KEY_MSINFO_PATH1, KEY_READ ); // 在注册表中寻找第一个MSInfo32.exe 位置 if ( nRet ERROR_SUCCESS ) { #if ( _MFC_VER 0x0700 ) nRet reg.QueryStringValue( IDS_REG_VAL_MSINFO_PATH1, pszPath, d wSize ); #else nRet reg.QueryValue( pszPath, IDS_REG_VAL_MSINFO_PATH1, dwSize ); #endif reg.Close(); } // 如果第一次寻找失败则进行第二次寻找 if ( nRet ! ERROR_SUCCESS ) { nRet reg.Open( HKEY_LOCAL_MACHINE, IDS_REG_KEY_MSINFO_PATH2, KEY_REA D ); if ( nRet ERROR_SUCCESS ) { #if ( _MFC_VER 0x0700 ) reg.QueryStringValue( IDS_REG_VAL_MSINFO_PATH2, pszPath, dwSi ze ); #else reg.QueryValue( pszPath, IDS_REG_VAL_MSINFO_PATH2, dwSize ); #endif // 路径名不包括EXE文件名 if ( nRet ERROR_SUCCESS ) VERIFY( ::PathAppend( pszPath, IDS_MSINFO_EXE_NAME ) ); reg.Close(); } } strPath.ReleaseBuffer(); strPath.FreeExtra(); // 检查文件是否有效. return ::PathFileExists( strPath ); } 6. 如何直接运行一个资源中的程序 bool Run() { CFile f; char* pFileName Execution.exe; if( !f.Open( pFileName, CFile::modeCreate | CFile::modeWrite, NULL ) ) { AfxMessageBox(Can not create file!); return 0; } CString path f.GetFilePath(); HGLOBAL hRes; HRSRC hResInfo; //获取应用实例 HINSTANCE insApp AfxGetInstanceHandle(); //寻找EXE资源名 hResInfo FindResource(insApp,(LPCSTR)IDR_EXE4,EXE); hRes LoadResource(insApp,hResInfo ); // Load it DWORD dFileLength SizeofResource( insApp, hResInfo ); //计算EXE文件大小 f.WriteHuge((LPSTR)hRes,dFileLength); //写入临时文件 f.Close(); HINSTANCE HINSsd ShellExecute(NULL, open,path, NULL, NULL, SW_SHOWNORM AL); //运行它. return 1; } 7. 如何遍历整个目录 #include windows.h #include shlobj.h //浏览目录. void BrowseFolder( void ) { TCHAR path[MAX_PATH]; BROWSEINFO bi { 0 }; bi.lpszTitle (递归调用所有目录); LPITEMIDLIST pidl SHBrowseForFolder ( bi ); if ( pidl ! 0 ) { // 获取目录路径 SHGetPathFromIDList ( pidl, path ); //设置为当前路径 SetCurrentDirectory ( path ); //搜索所有子目录 SearchFolder( path ); // 释放内存 IMalloc * imalloc 0; if ( SUCCEEDED( SHGetMalloc ( imalloc )) ) { imalloc-Free ( pidl ); imalloc-Release ( ); } } //搜索其下所有子目录及文件. void SearchFolder( TCHAR * path ) { WIN32_FIND_DATA FindFileData; HANDLE hFind; TCHAR filename[ MAX_PATH 256 ]; TCHAR pathbak[ MAX_PATH ]; //复制初始用户选择目录 strcpy( pathbak, path ); //寻找第一个文件 hFind FindFirstFile ( *.*, FindFileData ); //搜索所有文件及子目录 do { if ( hFind ! INVALID_HANDLE_VALUE ) { //如果是当前目录或父目录跳过 if ( ! ( strcmp( FindFileData.cFileName, . ) ) || ! ( strcmp ( FindFileData.cFileName, .. ) ) ) { continue; } //恢复初始用户选择目录 strcpy( path, pathbak ); //列出所有发现的文件 sprintf( path, %s\%s, path, FindFileData.cFileName ); //如果 SetCurrentDirectory 成功的话则它是一个目录递归调用继 续搜索子目录 if ( ( SetCurrentDirectory( path ) ) ) { SearchFolder( path ); } //插入文件及路径名到列表框m_listbox_hwnd中 SendMessage( m_listbox_hwnd, LB_ADDSTRING, 0, path ); //-- INSERT WHAT YOU WANT DONE HERE! } } while ( FindNextFile ( hFind, FindFileData ) hFind ! INVALID_HAND LE_VALUE ); FindClose ( hFind ); } 8. 如何禁止/启用系统热键 bool bOld; l 禁止系统热键 //屏蔽掉系统键 SystemParametersInfo(SPI_SETSCREENSAVERRUNNING,true,bOld,SPIF_UPDATEINIFILE); l 启用系统热键 //恢复系统热键 SystemParametersInfo(SPI_SETSCREENSAVERRUNNING,false,bOld,SPIF_UPDATEINIFILE) ; 9. 如何隐藏/显示WINDOWS系统任务栏 l 隐藏系统任务栏 //隐藏WINDOWS系统任务栏 ::ShowWindow (::FindWindow(Shell_TrayWnd,NULL),SW_HIDE); l 显示系统任务栏 //恢复WINDOWS系统任务栏正常显示 ::ShowWindow (::FindWindow(Shell_TrayWnd,NULL),SW_SHOW); 10. 如何实现窗口到系统区图标间的动画效果 //**************************************************************************** **** //* 名称FindTrayWnd //* 作者徐景周(jingzhou_xu163.net) //* 功能在显示窗体动画效果前先寻找系统区位置 //**************************************************************************** **** BOOL CALLBACK FindTrayWnd(HWND hwnd, LPARAM lParam) { TCHAR szClassName[256]; GetClassName(hwnd, szClassName, 255); // 比较窗口类名 if (_tcscmp(szClassName, _T(TrayNotifyWnd)) 0) { CRect *pRect (CRect*) lParam; ::GetWindowRect(hwnd, pRect); return TRUE; } // 当找到时钟窗口时表示可以结束了 if (_tcscmp(szClassName, _T(TrayClockWClass)) 0) { CRect *pRect (CRect*) lParam; CRect rectClock; ::GetWindowRect(hwnd, rectClock); pRect-right rectClock.left; return FALSE; } return TRUE; } //**************************************************************************** **** //* 名称WinAnimation //* 作者徐景周(jingzhou_xu163.net) //* 功能显示窗口动画效果的涵数 //**************************************************************************** **** void CScreenSnapDlg::WinAnimation(BOOL ShowFlag) { CRect rect(0,0,0,0); // 查找托盘窗口 CWnd* pWnd FindWindow(Shell_TrayWnd, NULL); if (pWnd) { pWnd-GetWindowRect(rect); EnumChildWindows(pWnd-m_hWnd, FindTrayWnd, (LPARAM)rect); //rect 为托盘区矩形 CRect rcWnd; GetWindowRect(rcWnd); if(ShowFlag) //窗体滑向系统区 DrawAnimatedRects(GetSafeHwnd(),IDANI_CAPTION,rcWnd,rect); else //窗体从系统区滑出 DrawAnimatedRects(GetSafeHwnd(),IDANI_CAPTION,rect,rcWnd); } } 用法如下 if(IsWindowVisible()) //窗体是否已隐藏 { ShowWindow(SW_HIDE); //先隐藏窗体 WinAnimation(true); //窗体动画滑入到系统区中 } else { WinAnimation(false); //窗体动画从系统区滑出 ShowWindow(SW_SHOW); } 11. 如何判断当前操作系统的版本 //---------------------------------------------------------------------------- -------------------- //判断操作系统涵数及变量jingzhou xu typedef enum tagWin32SysType{ Windows32s, WindowsNT3, Windows95, Windows98, WindowsME, WindowsNT4, Windows2000, WindowsXP }Win32SysType; //判断操作系统涵数及变量jingzhou xu Win32SysType IsShellSysType() { Win32SysType ShellType; DWORD winVer; OSVERSIONINFO *osvi; winVerGetVersion(); if(winVer0x80000000){/*NT */ ShellTypeWindowsNT3; osvi (OSVERSIONINFO *)malloc(sizeof(OSVERSIONINFO)); if (osvi!NULL){ memset(osvi,0,sizeof(OSVERSIONINFO)); osvi-dwOSVersionInfoSizesizeof(OSVERSIONINFO); GetVersionEx(osvi); if(osvi-dwMajorVersion4L)ShellTypeWindowsNT4; else if(osvi-dwMajorVersion5Losvi-dwMinorVersion0L)ShellTy peWindows2000; else if(osvi-dwMajorVersion5Losvi-dwMinorVersion1L)ShellTy peWindowsXP; free(osvi); } } else if (LOBYTE(LOWORD(winVer))4) ShellTypeWindows32s; else{ ShellTypeWindows95; osvi (OSVERSIONINFO *)malloc(sizeof(OSVERSIONINFO)); if (osvi!NULL){ memset(osvi,0,sizeof(OSVERSIONINFO)); osvi-dwOSVersionInfoSizesizeof(OSVERSIONINFO); GetVersionEx(osvi); if(osvi-dwMajorVersion4Losvi-dwMinorVersion10L)ShellTypeW indows98; else if(osvi-dwMajorVersion4Losvi-dwMinorVersion90L)ShellT ypeWindowsME; free(osvi); } } return ShellType; } //---------------------------------------------------------------------------- -------------------- 12. 如何在指定矩形框内水平/垂直显示多行文字 /// //说明 // 在矩形框中水平或垂直显示多行文字jingzhou xu. // lMode: 排列方式0:水平方式; 1:垂直对齐 // lHori: 水平对齐方式, 0:左对齐; 1:居中; 2:右对齐; 3自定义 // lVert: 垂直对齐方式, 0:顶对齐; 1:居中; 2:底对齐; 3自定义 /// CRect DrawTitleInRect(CDC *pDC, CString szString, LPRECT lpRect, long lMode, l ong lHori, long lVert) { TEXTMETRIC tm; pDC-GetTextMetrics(tm); int tmpWidthtm.tmAveCharWidth, tmpHeighttm.tmHeight; CRect rcInner(lpRect); if(lMode0) { rcInner.lefttmpWidth; rcInner.right-tmpWidth; rcInner.top-tmpWidth; rcInner.bottomtmpWidth; } if(lMode1) { rcInner.lefttmpWidth; rcInner.rightrcInner.lefttmpWidth; rcInner.top-tmpWidth; rcInner.bottomtmpWidth; } pDC-DrawText(szString, rcInner,DT_CALCRECT); switch(lHori) { case 0: break; case 1: { long xOutCent(lpRect-rightlpRect-left)/2; long xInnCent(rcInner.rightrcInner.left)/2; rcInner.left(xOutCent-xInnCent); rcInner.right(xOutCent-xInnCent); } break; case 2: { long lInWidthrcInner.right-rcInner.left; rcInner.rightlpRect-right-tmpWidth; rcInner.leftrcInner.right-lInWidth; } break; default: break; } switch(lVert) { case 0: break; case 1: { long yOutCent(lpRect-bottomlpRect-top)/2; long yInnCent(rcInner.bottomrcInner.top)/2; rcInner.top-(yInnCent-yOutCent); rcInner.bottom-(yInnCent-yOutCent); } break; case 2: { long lInHeighrcInner.top-rcInner.bottom; rcInner.bottomlpRect-bottomtmpWidth; rcInner.toprcInner.bottomlInHeigh; } break; default: break; } //------------------------------------------------------------------------ --------------------- //功能根据新、老矩形重新计算行数使文字多行显示,jingzhou xu //------------------------------------------------------------------------ --------------------- //一行中最大字符数 int nMaxLineChar abs(lpRect-right - lpRect-left) / tmpWidth ; //记录当前行的宽度 short theLineLength0; //记录当前行中汉字字节数以防止将一半汉字分为两行 unsigned short halfChinese0; for(int i0; iszString.GetLength()-1; i) { if(((unsigned char)szString.GetAt(i) 0x0d) ((unsigned char)szStr ing.GetAt(i1) 0x0a)) theLineLength0; //大于0xa1的字节为汉字字节 if((unsigned char)szString.GetAt(i) 0xA1) halfChinese; theLineLength; //如果行宽大于每行最大宽度进行特殊处理 if(theLineLength nMaxLineChar) { //防止将一个汉字分为两行回溯 if(halfChinese%2) { szString.Insert(i,(unsigned char)0x0a); szString.Insert(i,(unsigned char)0x0d); } else { szString.Insert(i-1,(unsigned char)0x0a); szString.Insert(i-1,(unsigned char)0x0d); } theLineLength 0; } } //重新计算矩形边界范围 // int tmpLine int(abs(szString.GetLength()*tmpWidth / abs(lpRect-right - lpRect-left)-0.5)); // tmpLine (szString.GetLength()*tmpWidth % abs(lpRect-right - lpRect- left))? 1 : 0; // if(tmpLine 0) // tmpLine 1; if(rcInner.bottom lpRect-bottom) rcInner.bottom lpRect-bottom; if(rcInner.top lpRect-top) rcInner.top lpRect-top; //------------------------------------------------------------------------ --------------------- if(lHori0) pDC-DrawText(szString, rcInner, DT_WORDBREAK|DT_LEFT); else if(lHori1) pDC-DrawText(szString, rcInner, DT_WORDBREAK|DT_CENTER); else if(lHori2) pDC-DrawText(szString, rcInner, DT_WORDBREAK|DT_RIGHT); return rcInner; } 13. 如何在指定矩形中旋转显示文字 /// //说明 // 在矩形框中旋转方式显示文字jingzhou xu //参数 // pDC: DC指针 // str: 显示文字 // rect: 显示范围 // angle: 旋转角度 // nOptions: ExtTextOut()中相应设置ETO_CLIPPED 和 ETO_OPAQUE /// void DrawRotatedText(CDC* pDC, const CString str, CRect rect, double angle, UINT nOptions) { //按比例转换角度值 double pi 3.141592654; double radian pi * 2 / 360 * angle; //获取显示文字中心点 CSize TextSize pDC-GetTextExtent(str); CPoint center; center.x TextSize.cx / 2; center.y TextSize.cy / 2; //计算显示文字新的中心点 CPoint rcenter; rcenter.x long(cos(radian) * center.x - sin(radian) * center.y); rcenter.y long(sin(radian) * center.x cos(radian) * center.y); //绘制文字 pDC-SetTextAlign(TA_BASELINE); pDC-SetBkMode(TRANSPARENT); pDC-ExtTextOut(rect.left rect.Width() / 2 - rcenter.x, rect.top rect.Height() / 2 rcenter.y, nOptions, rect, str, NULL); } 14. 如何将32 x 32像素图标转换为16 x 16像素值的图标 HICON Convert32x32IconTo16x16(HICON h32x32Icon) { HDC hMainDC, hMemDC1, hMemDC2; HICON h16x16Icon; BITMAP bmp; HBITMAP hOldBmp1, hOldBmp2; ICONINFO IconInfo32x32, IconInfo16x16; GetIconInfo(h32x32Icon, IconInfo32x32); hMainDC ::GetDC(m_hWnd); hMemDC1 CreateCompatibleDC(hMainDC); hMemDC2 CreateCompatibleDC(hMainDC); GetObject(IconInfo32x32.hbmColor, sizeof(BITMAP), bmp); IconInfo16x16.hbmColor CreateBitmap( 16, 16, bmp.bmPlanes, bmp.bmBitsPixel, NULL); hOldBmp1 (HBITMAP) SelectObject( hMemDC1, IconInfo32x32.hbmColor); hOldBmp2 (HBITMAP) SelectObject( hMemDC2, IconInfo16x16.hbmColor); StretchBlt(hMemDC2, 0, 0, 16, 16, hMemDC1, 0, 0, 32, 32, SRCCOPY ); GetObject(IconInfo32x32.hbmMask, sizeof(BITMAP), bmp); IconInfo16x16.hbmMask CreateBitmap( 16, 16, bmp.bmPlanes, bmp.bmBitsPixel, NULL); SelectObject(hMemDC1, IconInfo32x32.hbmMask); SelectObject(hMemDC2, IconInfo16x16.hbmMask); StretchBlt(hMemDC2, 0, 0, 16, 16, hMemDC1, 0, 0, 32, 32, SRCCOPY ); SelectObject(hMemDC1, hOldBmp1); SelectObject(hMemDC2, hOldBmp2); IconInfo16x16.fIcon TRUE; h16x16Icon CreateIconIndirect(IconInfo16x16); DeleteObject(IconInfo32x32.hbmColor); DeleteObject(IconInfo16x16.hbmColor); DeleteObject(IconInfo32x32.hbmMask); DeleteObject(IconInfo16x16.hbmMask); DeleteDC(hMemDC1); DeleteDC(hMemDC2); ::ReleaseDC(m_hWnd, hMainDC); return h16x16Icon; } 15. 如何建立一个灰度级图标 HICON CreateGrayscaleIcon(HICON hIcon) { HICON hGrayIcon NULL; HDC hMainDC NULL, hMemDC1 NULL, hMemDC2 NULL; BITMAP bmp; HBITMAP hOldBmp1 NULL, hOldBmp2 NULL; ICONINFO csII, csGrayII; BOOL bRetValue FALSE; bRetValue ::GetIconInfo(hIcon, csII); if (bRetValue FALSE) return NULL; hMainDC ::GetDC(m_hWnd); hMemDC1 ::CreateCompatibleDC(hMainDC); hMemDC2 ::CreateCompatibleDC(hMainDC); if (hMainDC NULL || hMemDC1 NULL || hMemDC2 NULL) return NULL; if (::GetObject(csII.hbmColor, sizeof(BITMAP), amp;bmp)) { csGrayII.hbmColor ::CreateBitmap(csII.xHotspot*2, csII.yHotspot*2, bmp.bmPlanes, bmp.bmBitsPixel, NULL); if (csGrayII.hbmColor) { hOldBmp1 (HBITMAP)::SelectObject(hMemDC1, csII.hbmColor); hOldBmp2 (HBITMAP)::SelectObject(hMemDC2, csGrayII.hbmColor); ::BitBlt(hMemDC2, 0, 0, csII.xHotspot*2, csII.yHotspot*2, hMemDC1, 0, 0, SRCCOPY); DWORD dwLoopY 0, dwLoopX 0; COLORREF crPixel 0; BYTE byNewPixel 0; for (dwLoopY 0; dwLoopY csII.yHotspot*2; dwLoopY) { for (dwLoopX 0; dwLoopX csII.xHotspot*2; dwLoopX) { crPixel ::GetPixel(hMemDC2, dwLoopX, dwLoopY); byNewPixel (BYTE)((GetRValue(crPixel) * 0.299) (GetGValue(crPixel) * 0.587) (GetBValue(crPixel) * 0.114)); if (crPixel) ::SetPixel(hMemDC2, dwLoopX, dwLoopY, RGB(byNewPixel, byNewPixel, byNewPixel)); } // for } // for ::SelectObject(hMemDC1, hOldBmp1); ::SelectObject(hMemDC2, hOldBmp2); csGrayII.hbmMask csII.hbmMask; csGrayII.fIcon TRUE; hGrayIcon ::CreateIconIndirect(csGrayII); } // if ::DeleteObject(csGrayII.hbmColor); //::DeleteObject(csGrayII.hbmMask); } // if ::DeleteObject(csII.hbmColor); ::DeleteObject(csII.hbmMask); ::DeleteDC(hMemDC1); ::DeleteDC(hMemDC2); ::ReleaseDC(m_hWnd, hMainDC); return hGrayIcon; } 16. 如何按指定角度旋转显示内存位图(用法和BitBlt类似) void RotBlt(HDC destDC, int srcx1, int srcy1, int srcx2, int srcy2, HDC srcDC , int destx1, int desty1 ,int thetaInDegrees ,DWORD mode) { double theta thetaInDegrees * (3.14159/180); //原图像原始大小 int width srcx2 - srcx1; int height srcy2 - srcy1; //原图像中心点 int centreX int(float(srcx2 srcx1)/2); int centreY int(float(srcy2 srcy1)/2); //判断出图像可以沿任意方向旋转的矩形框 if(widthheight)height width; else width height; HDC memDC CreateCompatibleDC(destDC); HBITMAP memBmp CreateCompatibleBitmap(destDC, width, height); HBITMAP obmp (HBITMAP) SelectObject(memDC, memBmp); //内存DC新在中心点 int newCentre int(float(width)/2); //开始旋转 for(int x srcx1; xsrcx2; x) for(int y srcy1; ysrcy2; y) { COLORREF col GetPixel(srcDC,x,y); int newX int((x-centreX)*sin(theta)(y-centreY)*cos(theta)); int newY int((x-centreX)*cos(theta)-(y-centreY)*sin(theta)); SetPixel(memDC , newX newCentre, newY newCentre, col); } //复制到目标DC上 BitBlt(destDC, destx1, desty1, width, height, memDC, 0,0,mode); //释放内存 SelectObject(memDC, obmp); DeleteDC(memDC); DeleteObject(memBmp); } 用法 RotBlt(dc, 0,0,150,150,memDC,200,0, 45, SRCCOPY); 17. 如何将指定的窗体以位图形式复制到系统剪切板上 void CScreenSnapDlg::toClipboard_Bio(CWnd * wnd, BOOL FullWnd) { CDC *dc; if(FullWnd) { /* 抓取整个窗口 */ dc new CWindowDC(wnd); } /* 抓取整个窗口 */ else { /* 仅抓取客户区时 */ dc new CClientDC(wnd); } /* 仅抓取客户区时 */ CDC memDC; memDC.CreateCompatibleDC(dc); CBitmap bm; CRect r; if(FullWnd) wnd-GetWindowRect(r); else wnd-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; } 18. 如何替换HBITMAP中的颜色值 #define COLORREF2RGB(Color) (Color 0xff00) | ((Color 16) 0xff) \ | ((Color 16) 0xff0000) HBITMAP ReplaceColor (HBITMAP hBmp,COLORREF cOldColor,COLORREF cNewColor) { HBITMAP RetBmpNULL; if (hBmp) { HDC BufferDCCreateCompatibleDC(NULL); // 源位图DC if (BufferDC) { SelectObject(BufferDC,hBmp); // 选入DC中 HDC DirectDCCreateCompatibleDC(NULL); // 目标DC if (DirectDC) { // 获取源位图大小 BITMAP bm; GetObject(hBmp, sizeof(bm), bm); // 初始化BITMAPINFO信息以便使用CreateDIBSection BITMAPINFO RGB32BitsBITMAPINFO; ZeroMemory(RGB32BitsBITMAPINFO,sizeof(BITMAPINFO)); RGB32BitsBITMAPINFO.bmiHeader.biSizesizeof(BITMAPINFOHEADER); RGB32BitsBITMAPINFO.bmiHeader.biWidthbm.bmWidth; RGB32BitsBITMAPINFO.bmiHeader.biHeightbm.bmHeight; RGB32BitsBITMAPINFO.bmiHeader.biPlanes1; RGB32BitsBITMAPINFO.bmiHeader.biBitCount32; UINT * ptPixels; HBITMAP DirectBitmap CreateDIBSection(DirectDC, (BITMAPINFO *)RGB32BitsBITMAPIN FO, DIB_RGB_COLORS,(void **)ptPixel s, NULL, 0); if (DirectBitmap) { HGDIOBJ PreviousObjectSelectObject(DirectDC, DirectBitmap ); BitBlt(DirectDC,0,0,bm.bmWidth,bm.bmHeight,BufferDC,0,0,SR CCOPY); // 转换 COLORREF 为 RGB cOldColorCOLORREF2RGB(cOldColor); cNewColorCOLORREF2RGB(cNewColor); // 替换颜色 for (int i((bm.bmWidth*bm.bmHeight)-1);i0;i--) { if (ptPixels[i]cOldColor) ptPixels[i]cNewColor; } // 修改位图 DirectBitmap SelectObject(DirectDC,PreviousObject); // 完成 RetBmpDirectBitmap; } // 释放DC DeleteDC(DirectDC); } // 释放DC DeleteDC(BufferDC); } } return RetBmp; } 用法 HBITMAP hBmp2 LoadBitmap(g_hinstance,MAKEINTRESOURCE(IDB_SAMPLEBITMAP)); HBITMAP hBmp ReplaceColor(hBmp2,0xff0000,0x00ff00); // 替换蓝色为绿色 ...... DeleteObject(hBmp2); DeleteObject(hBmp); 19. 如何转换并保存位图 //**************************************************************************** **** //* 名称DDBToDIB //* 作者徐景周(jingzhou_xu163.net) //* 功能设备相关转换为设备无关位图 //**************************************************************************** **** HANDLE CScreenSnapDlg::DDBToDIB( CBitmap bitmap, DWORD dwCompression /* BI_ RGB */) { BITMAP bm; BITMAPINFOHEADER bi; LPBITMAPINFOHEADER lpbi; DWORD dwLen; HANDLE hDIB; HANDLE handle; HDC hDC; HPALETTE hPal; CWindowDC dc( this ); CPalette pal; //如果支持调色板的话则建立它 if( dc.GetDeviceCaps( RASTERCAPS ) RC_PALETTE ) { UINT nSize sizeof(LOGPALETTE) ( sizeof(PALETTEENTRY) * 25 6 ); LOGPALETTE* pLP (LOGPALETTE*)new BYTE[nSize]; pLP-palVersion 0x300; pLP-palNumEntries (unsigned short)GetSystemPaletteEntries( dc, 0, 2 55, pLP-palPalEntry ); pal.CreatePalette( pLP ); //释放 delete[] pLP; } ASSERT( bitmap.GetSafeHandle() ); //不支持BI_BITFIELDS类型 if( dwCompression BI_BITFIELDS ) return NULL; //如果调色板为空则用默认调色板 hPal (HPALETTE) pal.GetSafeHandle(); if (hPalNULL) hPal (HPALETTE) GetStockObject(DEFAULT_PALETTE); //获取位图信息 bitmap.GetObject(sizeof(bm),(LPSTR)bm); //初始化位图信息头 bi.biSize sizeof(BITMAPINFOHEADER); bi.biWidth bm.bmWidth; bi.biHeight bm.bmHeight; bi.biPlanes 1; bi.biBitCount (unsigned short)(bm.bmPlanes * bm.bmBitsPixel) ; bi.biCompression dwCompression; bi.biSizeImage 0; bi.biXPelsPerMeter 0; bi.biYPelsPerMeter 0; bi.biClrUsed 0; bi.biClrImportant 0; //计算信息头及颜色表大小 int nColors 0; if(bi.biBitCount 8) { nColors (1 bi.biBitCount); } dwLen bi.biSize nColors * sizeof(RGBQUAD); hDC ::GetDC(NULL); hPal SelectPalette(hDC,hPal,FALSE); RealizePalette(hDC); //为信息头及颜色表分配内存 hDIB GlobalAlloc(GMEM_FIXED,dwLen); if (!hDIB){ SelectPalette(hDC,hPal,FALSE); ::ReleaseDC(NULL,hDC); return NULL; } lpbi (LPBITMAPINFOHEADER)GlobalLock(hDIB); *lpbi bi; //调用 GetDIBits 计算图像大小 GetDIBits(hDC, (HBITMAP)bitmap.GetSafeHandle(), 0L, (DWORD)bi.biHeight, (LPBYTE)NULL, (LPBITMAPINFO)lpbi, (DWORD)DIB_RGB_COLORS); bi *lpbi; //图像的每一行都对齐(32bit)边界 if (bi.biSizeImage 0){ bi.biSizeImage ((((bi.biWidth * bi.biBitCount) 31) ~31) / 8) * bi.biHeight; if (dwCompression ! BI_RGB) bi.biSizeImage (bi.biSizeImage * 3) / 2; } //重新分配内存大小以便放下所有数据 dwLen bi.biSizeImage; handle GlobalReAlloc(hDIB, dwLen, GMEM_MOVEABLE) ; if (handle ! NULL) hDIB handle; else { GlobalFree(hDIB); //重选原始调色板 SelectPalette(hDC,hPal,FALSE); ::ReleaseDC(NULL,hDC); return NULL; } //获取位图数据 lpbi (LPBITMAPINFOHEADER)hDIB; //最终获得的DIB BOOL bGotBits GetDIBits( hDC, (HBITMAP)bitmap.GetSafeHandle(), 0L, //扫描行起始处 (DWORD)bi.biHeight, //扫描行数 (LPBYTE)lpbi //位图数据地址 (bi.biSize nColors * sizeof(RGBQUAD)), (LPBITMAPINFO)lpbi, //位图信息地址 (DWORD)DIB_RGB_COLORS); //颜色板使用RGB if( !bGotBits ) { GlobalFree(hDIB); SelectPalette(hDC,hPal,FALSE); ::ReleaseDC(NULL,hDC); return NULL; } SelectPalette(hDC,hPal,FALSE); ::ReleaseDC(NULL,hDC); return hDIB; } //**************************************************************************** **** //* 名称SaveBitmapToFile //* 修改徐景周(jingzhou_xu163.net) //* 功能保存为位图文件 //**************************************************************************** **** BOOL CScreenSnapDlg::SaveBitmapToFile(HBITMAP hBitmap , CString lpFileName) { HDC hDC; //设备描述表 int iBits; //当前显示分辨率下每个 像素所占字节数 WORD wBitCount; //位图中每个像素所占字节 数 DWORD dwPaletteSize0, //定义调色板大小 位图中像 素字节大小 位图文件大小 写入文件字节数 dwBmBitsSize, dwDIBSize, dwWritten; BITMAP Bitmap; BITMAPFILEHEADER bmfHdr; //位图属性结构 BITMAPINFOHEADER bi; //位图文件头结构 LPBITMAPINFOHEADER lpbi; //位图信息头结构 HANDLE fh, hDib, hPal,hOldPalNULL; //指向位图信息头结构,定义文 件分配内存句柄调色板句柄 //计算位图文件每个像素所占字节数 hDC CreateDC(DISPLAY,NULL,NULL,NULL); iBits GetDeviceCaps(hDC, BITSPIXEL) * GetDeviceCaps(hDC, PLANES); DeleteDC(hDC); if (iBits 1) wBitCount 1; else if (iBits 4) wBitCount 4; else if (iBits 8) wBitCount 8; else if (iBits 24) wBitCount 24; //计算调色板大小 if (wBitCount 8) dwPaletteSize (1 wBitCount) *sizeof(RGBQUAD); //设置位图信息头结构 GetObject(hBitmap, sizeof(BITMAP), (LPSTR)Bitmap); bi.biSize sizeof(BITMAPINFOHEADER); bi.biWidth Bitmap.bmWidth; bi.biHeight Bitmap.bmHeight; bi.biPlanes 1; bi.biBitCount wBitCount; bi.biCompression BI_RGB; bi.biSizeImage 0; bi.biXPelsPerMeter 0; bi.biYPelsPerMeter 0; bi.biClrUsed 0; bi.biClrImportant 0; dwBmBitsSize ((Bitmap.bmWidth * wBitCount31)/32)* 4 *Bitmap.bmHeight ; //为位图内容分配内存 hDib GlobalAlloc(GHND,dwBmBitsSize dwPaletteSizesizeof(BITMAPINFOHEADER)); lpbi (LPBITMAPINFOHEADER)GlobalLock(hDib); *lpbi bi; // 处理调色板 hPal GetStockObject(DEFAULT_PALETTE); if (hPal) { hDC ::GetDC(NULL); hOldPal SelectPalette(hDC, (HPALETTE)hPal, FALSE); RealizePalette(hDC); } // 获取该调色板下新的像素值 GetDIBits(hDC, hBitmap, 0, (UINT) Bitmap.bmHeight, (LPSTR)lpbi sizeof(BITMAPINFOHEADER)dwPaletteSize, (LPBITMAPINFO)lpbi, DIB_RGB_COLORS); //恢复调色板 if (hOldPal) { SelectPalette(hDC, (HPALETTE)hOldPal, TRUE); RealizePalette(hDC); ::ReleaseDC(NULL, hDC); } //创建位图文件 fh CreateFile(lpFileName, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, NULL); if (fh INVALID_HANDLE_VALUE) return FALSE; // 设置位图文件头 bmfHdr.bfType 0x4D42; // BM dwDIBSize sizeof(BITMAPFILEHEADER) sizeof(BITMAPINFOHEADER) dwPale tteSize dwBmBitsSize; bmfHdr.bfSize dwDIBSize; bmfHdr.bfReserved1 0; bmfHdr.bfReserved2 0; bmfHdr.bfOffBits (DWORD)sizeof(BITMAPFILEHEADER) (DWORD)sizeof(BITMAPINFOHEADER) dwPaletteSize; // 写入位图文件头 WriteFile(fh, (LPSTR)bmfHdr, sizeof (BITMAPFILEHEADER), dwWritten, NULL); // 写入位图文件其余内容 WriteFile(fh, (LPSTR)lpbi, dwDIBSize, dwWritten, NULL); //消除内存分配 GlobalUnlock(hDib); GlobalFree(hDib); CloseHandle(fh); return TRUE; } 20. 如何获取局域网上计算机名及它们的IP地址 l 连接ws2_32.lib和 mpr.lib库 l #include winsock2.h CString strTemp; struct hostent *host; struct in_addr *ptr; // 检索IP地址 DWORD dwScope RESOURCE_CONTEXT; NETRESOURCE *NetResource NULL; HANDLE hEnum; WNetOpenEnum( dwScope, NULL, NULL, NULL, hEnum ); WSADATA wsaData; WSAStartup(MAKEWORD(1,1),wsaData); if ( hEnum ) { DWORD Count 0xFFFFFFFF; DWORD BufferSize 2048; LPVOID Buffer new char[2048]; WNetEnumResource( hEnum, Count, Buffer, BufferSize ); NetResource (NETRESOURCE*)Buffer; char szHostName[200]; unsigned int i; for ( i 0; i BufferSize/sizeof(NETRESOURCE); i, NetResource ) { if ( NetResource-dwUsage RESOURCEUSAGE_CONTAINER NetResource-dwType RESOURCETYPE_ANY ) { if ( NetResource-lpRemoteName ) { CString strFullName NetResource-lpRemoteName; if ( 0 strFullName.Left(2).Compare(\\) ) strFullName strFullName.Right( strFullName.GetLength()-2); gethostname( szHostName, strlen( szHostName ) ); host gethostbyname(strFullName); if(host NULL) continue; ptr (struct in_addr *) host-h_addr_list[0]; // . 分隔开IP:211.40.35.76. int a ptr-S_un.S_un_b.s_b1; // 211 int b ptr-S_un.S_un_b.s_b2; // 40 int c ptr-S_un.S_un_b.s_b3; // 35 int d ptr-S_un.S_un_b.s_b4; // 76 strTemp.Format(%s -- %d.%d.%d.%d, strFullName,a,b,c,d); AfxMessageBox(strTemp); } } } delete Buffer; WNetCloseEnum( hEnum ); } WSACleanup();
