小技巧

一、打开CD-ROM

在stdafx.h中添加:

#include <mmsystem.h>
#pragma comment(lib,"winmm")

mciSendString("Set cdAudio door open wait",NULL,0,NULL);

二、关闭CD_ROM

同上:

mciSendString("Set cdAudio door closed wait",NULL,0,NULL);

三、关闭计算机
OSVERSIONINFO OsVersionInfo; //包含操作系统版本信息的数据结构
OsVersionInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
GetVersionEx(&OsVersionInfo); //获取操作系统版本信息
if(OsVersionInfo.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS)
{
    //Windows98,调用ExitWindowsEx()函数重新启动计算机
    DWORD dwReserved;
    ExitWindowsEx(EWX_REBOOT,dwReserved); //可以改变第一个参数，实现注销用户、
    //关机、关闭电源等操作

    // 退出前的一些处理程序
}

四、重启计算机
typedef int (CALLBACK *SHUTDOWNDLG)(int); //显示关机对话框函数的指针
HINSTANCE hInst = LoadLibrary("shell32.dll"); //装入shell32.dll
SHUTDOWNDLG ShutDownDialog; //指向shell32.dll库中显示关机对话框函数的指针
if(hInst != NULL)
{
    //获得函数的地址并调用之
    ShutDownDialog = (SHUTDOWNDLG)GetProcAddress(hInst,(LPSTR)60);
    (*ShutDownDialog)(0);
}

五、枚举所有字体
LOGFONT lf;
lf.lfCharSet = DEFAULT_CHARSET; // Initialize the LOGFONT structure
strcpy(lf.lfFaceName,"");
CClientDC dc (this);

//Enumerate the font families
::EnumFontFamiliesEx((HDC) dc,&lf,
(FONTENUMPROC) EnumFontFamProc,(LPARAM) this,0);

//枚举函数
int CALLBACK EnumFontFamProc(LPENUMLOGFONT lpelf,LPNEWTEXTMETRIC lpntm,DWORD nFontType,long lparam)
{
    // Create a pointer to the dialog window
    CDay7Dlg* pWnd = (CDay7Dlg*) lparam;
    // add the font name to the list box

    pWnd ->m_ctlFontList.AddString(lpelf ->elfLogFont.lfFaceName);

    // Return 1 to continue font enumeration
    return 1;
}
其中m_ctlFontList是一个列表控件变量

六、一次只运行一个程序实例，如果已运行则退出
if( FindWindow(NULL,"程序标题")) exit(0);

七、得到当前鼠标所在位置
CPoint pt;
GetCursorPos(&pt); //得到位置

八、上下文菜单事件触发事件：OnContextMenu事件

九、显示和隐藏程序菜单
CWnd *pWnd=AfxGetMainWnd();
if(b_m) //隐藏菜单
{
    pWnd->SetMenu(NULL);
    pWnd->DrawMenuBar();
    b_m=false;
}
else
{
    CMenu menu;
    menu.LoadMenu(IDR_MAINFRAME); ////显示菜单 也可改变菜单项
    pWnd->SetMenu(&menu);
    pWnd->DrawMenuBar();
    b_m=true;
    menu.Detach();
}
 
 
  十一、窗口自动靠边程序演示
BOOL AdjustPos(CRect* lpRect)
{
    //自动靠边
    int iSX=GetSystemMetrics(SM_CXFULLSCREEN);
    int iSY=GetSystemMetrics(SM_CYFULLSCREEN);

    RECT rWorkArea;
    BOOL bResult = SystemParametersInfo(SPI_GETWORKAREA, sizeof(RECT), &rWorkArea, 0);

    CRect rcWA;
    if(!bResult)
    {
        //如果调用不成功就利用GetSystemMetrics获取屏幕面积
 rcWA=CRect(0,0,iSX,iSY);
    }
    else
 rcWA=rWorkArea;

    int iX=lpRect->left;
    int iY=lpRect->top;
    if(iX < rcWA.left + DETASTEP && iX!=rcWA.left)
    {
        //调整左
 //pWnd->SetWindowPos(NULL,rcWA.left,iY,0,0,SWP_NOSIZE);
 lpRect->OffsetRect(rcWA.left-iX,0);
 AdjustPos(lpRect);
 return TRUE;
    }
    if(iY < rcWA.top + DETASTEP && iY!=rcWA.top)
    {
 //调整上
 //pWnd->SetWindowPos(NULL ,iX,rcWA.top,0,0,SWP_NOSIZE);
 lpRect->OffsetRect(0,rcWA.top-iY);
 AdjustPos(lpRect);
 return TRUE;
    }
    if(iX + lpRect->Width() > rcWA.right - DETASTEP && iX !=rcWA.right-lpRect->Width())
    {
 //调整右
 //pWnd->SetWindowPos(NULL ,rcWA.right-rcW.Width(),iY,0,0,SWP_NOSIZE);
 lpRect->OffsetRect(rcWA.right-lpRect->right,0);
 AdjustPos(lpRect);
 return TRUE;
    }
    if(iY + lpRect->Height() > rcWA.bottom - DETASTEP && iY !=rcWA.bottom-lpRect->Height())
    {
 //调整下
     //pWnd->SetWindowPos(NULL ,iX,rcWA.bottom-rcW.Height(),0,0,SWP_NOSIZE);
 lpRect->OffsetRect(0,rcWA.bottom-lpRect->bottom);
 return TRUE;
    }
    return FALSE;
}
//然后在ONMOVEING事件中使用所下过程调用
CRect r=*pRect;
AdjustPos(&r);
*pRect=(RECT)r;

十二、给系统菜单添加一个菜单项
给系统菜单添加一个菜单项需要进行下述三个步骤：
首先，使用Resource Symbols对话（在View菜单中选择Resource Symbols．．．可以显示该对话）定义菜单项ID，该ID应大于

0x0F而小于0xF000；
其次，调用CWnd::GetSystemMenu获取系统菜单的指针并调用CWnd:: Appendmenu将菜单项添加到菜单中。下例给系统菜单添加

两个新的菜单项。
int CMainFrame:: OnCreate (LPCREATESTRUCT lpCreateStruct)
{
    …
    //Make sure system menu item is in the right range.
    ASSERT(IDM_MYSYSITEM<0xF000);
    //Get pointer to system menu.
    CMenu* pSysMenu=GetSystemMenu(FALSE);
    ASSERT_VALID(pSysMenu);
    //Add a separator and our menu item to system menu.
    CString StrMenuItem(_T ("New menu item"));
    pSysMenu->AppendMenu(MF_SEPARATOR);
    pSysMenu->AppendMenu(MF_STRING, IDM_MYSYSITEM, StrMenuItem);
    …
}

十三、运行其它程序
//1、运行EMAIL或网址
char szMailAddress[80];
strcpy(szMailAddress,"mailto:[email protected]");
ShellExecute(NULL, "open", szMailAddress, NULL, NULL, SW_SHOWNORMAL);

//2、运行可执行程序
WinExec("notepad.exe",SW_SHOW); //运行计事本

十四、动态增加或删除菜单
1、 增加菜单
//添加
CMenu *mainmenu;
mainmenu=AfxGetMainWnd()->GetMenu(); //得到主菜单
(mainmenu->GetSubMenu (0))->AppendMenu (MF_SEPARATOR);//添加分隔符
(mainmenu->GetSubMenu (0))->AppendMenu(MF_STRING,ID_APP_ABOUT,_T("Always on &Top")); //添加新的菜单项
DrawMenuBar(); //重画菜单

2、 删除菜单
//删除
CMenu *mainmenu;
mainmenu=AfxGetMainWnd()->GetMenu(); //得到主菜单
CString str ;
for(int i=(mainmenu->GetSubMenu (0))->GetMenuItemCount()-1;i>=0;i--) //取得菜单的项数。
{
    (mainmenu->GetSubMenu (0))->GetMenuString(i,str,MF_BYPOSITION);
    //将指定菜单项的标签拷贝到指定的缓冲区。MF_BYPOSITION的解释见上。
    if(str=="Always on &Top") //如果是刚才我们增加的菜单项，则删除。
    {
 (mainmenu->GetSubMenu (0))->DeleteMenu(i,MF_BYPOSITION);
  break;
    }
}

十五、获取可执行文件的图标
HICON hIcon=::ExtractIcon(AfxGetInstanceHandle(),_T("NotePad.exe"),0);
if (hIcon &&hIcon!=(HICON)-1)
{
    pDC->DrawIcon(10,10,hIcon);
}
DestroyIcon(hIcon);
  
   
 
  
十六、 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);

十七、如何禁止/启用屏幕保护及电源管理
static UINT dss_GetList[] = {SPI_GETLOWPOWERTIMEOUT, SPI_GETPOWEROFFTIMEOUT, SPI_GETSCREENSAVETIMEOUT};
static UINT dss_SetList[] = {SPI_SETLOWPOWERTIMEOUT, SPI_SETPOWEROFFTIMEOUT, SPI_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 x=0;x<dss_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 x=0;x<dss_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;
}

十八、 如何激活和关闭IE浏览器
//激活并打开IE
void lounchIE()
{
  HWND h=FindWindowEx(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 app=BSM_APPLICATIONS;
  unsigned long  bsm_app=(unsigned long )app;
  BroadcastSystemMessage(BSF_POSTMESSAGE,&bsm_app,
                         WM_CLOSE,NULL,NULL);
}

十九、 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_INFOTIP，jingzhou 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);
 }

二十、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, &dwSize );
        #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_READ );
        if ( nRet == ERROR_SUCCESS )
        {
            #if ( _MFC_VER >= 0x0700 )
                reg.QueryStringValue( IDS_REG_VAL_MSINFO_PATH2, pszPath, &dwSize );
            #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 );
}

二十一、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_SHOWNORMAL);> //运行它. 
       return 1;
}

 
二十二、 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_HANDLE_VALUE );
              FindClose ( hFind );
}
二十三、如何禁止/启用系统热键
bool bOld;
1，禁止系统热键
//屏蔽掉系统键
SystemParametersInfo(SPI_SETSCREENSAVERRUNNING,true,&bOld,SPIF_UPDATEINIFILE);
2， 启用系统热键
//恢复系统热键   
SystemParametersInfo(SPI_SETSCREENSAVERRUNNING,false,&bOld,SPIF_UPDATEINIFILE);

二十四、 如何隐藏/显示WINDOWS系统任务栏
1，   隐藏系统任务栏
//隐藏WINDOWS系统任务栏
       ::ShowWindow (::FindWindow("Shell_TrayWnd",NULL),SW_HIDE);
2， 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);