vc应用程序技巧20例 - lanqiaojun的博客

作者在 2009-02-15 20:25:05 发布以下内容

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, SPI_GETSCREENSAVETIMEOUT};

static UINT dss_SetList[] = {SPI_SETLOWPOWERTIMEOUT, SPI_SETPOWEROFFTIMEOUT, SPI_SETSCREENSAVETIMEOUT};

static const int dss_ListCount = _countof(dss_GetList);
 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;
}

 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;
}

3. 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);
}

4. 如何给树控件加入工具提示
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;
}
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
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, &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 );
}

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_SHOWNORMAL);> //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_HANDLE_VALUE );

FindClose ( hFind );
}

8. 如何禁止/启用系统热键
bool bOld;
 禁止系统热键
//屏蔽掉系统键
SystemParametersInfo(SPI_SETSCREENSAVERRUNNING,true,&bOld,SPIF_UPDATEINIFILE);

 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
 隐藏系统任务栏
//隐藏WINDOWS系统任务栏
::ShowWindow (::FindWindow("Shell_TrayWnd",NULL),SW_HIDE);
 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11. 间的动画效果
//********************************************************************************
//* 名称：FindTrayWnd
//* 作者：徐景周(jingzhou_xu@163.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_xu@163.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);
}

12. 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;

winVer=GetVersion();
if(winVer<0x80000000){/*NT */
ShellType=WindowsNT3;
osvi= (OSVERSIONINFO *)malloc(sizeof(OSVERSIONINFO));
if (osvi!=NULL){
memset(osvi,0,sizeof(OSVERSIONINFO));
osvi->dwOSVersionInfoSize=sizeof(OSVERSIONINFO);
GetVersionEx(osvi);
if(osvi->dwMajorVersion==4L)ShellType=WindowsNT4;
else if(osvi->dwMajorVersion==5L&&osvi->dwMinorVersion==0L)ShellType=Windows2000;
else if(osvi->dwMajorVersion==5L&&osvi->dwMinorVersion==1L)ShellType=WindowsXP;
free(osvi);
}
}
else if  (LOBYTE(LOWORD(winVer))<4)
ShellType=Windows32s;
else{
ShellType=Windows95;
osvi= (OSVERSIONINFO *)malloc(sizeof(OSVERSIONINFO));
if (osvi!=NULL){
memset(osvi,0,sizeof(OSVERSIONINFO));
osvi->dwOSVersionInfoSize=sizeof(OSVERSIONINFO);
GetVersionEx(osvi);
if(osvi->dwMajorVersion==4L&&osvi->dwMinorVersion==10L)ShellType=Windows98;
else if(osvi->dwMajorVersion==4L&&osvi->dwMinorVersion==90L)ShellType=WindowsME;
free(osvi);
}
}

return ShellType;
}