一个文件修改监视的小工具

第一次在这个BLOG写发表.

主要用到一个API：ReadDirectoryChangesW 并开多个线程来监视多个文件夹的内容改变的情况，API的实现如下(代码中的其中一)：下载该文件

UINT ListCtrlX::StateoutIng( LPVOID lParam)    //系统监视的实现
...{ 
 MYDATA* p= (MYDATA *)lParam;
    ListCtrlX* pFsw = (ListCtrlX*)p->Param;
      HANDLE hdir = CreateFile(
        p->lpDir,
        GENERIC_READ|GENERIC_WRITE,
        FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,
        NULL,
        OPEN_EXISTING,
        FILE_FLAG_BACKUP_SEMANTICS,
        NULL
    );
    if( INVALID_HANDLE_VALUE == hdir ) return false;

    char buf[ 2*(sizeof(FILE_NOTIFY_INFORMATION)+MAX_PATH) ];
    FILE_NOTIFY_INFORMATION* pNotify=(FILE_NOTIFY_INFORMATION *)buf;
    DWORD BytesReturned;
    while(ReadDirectoryChangesW(hdir,
            pNotify,
            sizeof(buf),
            true,
            FILE_NOTIFY_CHANGE_FILE_NAME|
            FILE_NOTIFY_CHANGE_DIR_NAME|
            FILE_NOTIFY_CHANGE_ATTRIBUTES|
            FILE_NOTIFY_CHANGE_SIZE|
            FILE_NOTIFY_CHANGE_LAST_WRITE|
            FILE_NOTIFY_CHANGE_LAST_ACCESS|
            FILE_NOTIFY_CHANGE_CREATION|
            FILE_NOTIFY_CHANGE_SECURITY,
            &BytesReturned,
            NULL,
            NULL ))
     ...{
    char tmp[1024], str1[1024], str2[1024];
    CString temp;
        memset( tmp, 0, sizeof(tmp) );
        WideCharToMultiByte( CP_ACP,0,pNotify->FileName,pNotify->FileNameLength/2,tmp,99,NULL,NULL );
        strcpy( str1, tmp );
        if( 0 != pNotify->NextEntryOffset )
        ...{
            PFILE_NOTIFY_INFORMATION p = (PFILE_NOTIFY_INFORMATION)((char*)pNotify+pNotify->NextEntryOffset);
            memset( tmp, 0, sizeof(tmp) );
            WideCharToMultiByte( CP_ACP,0,p->FileName,p->FileNameLength/2,tmp,99,NULL,NULL );
            strcpy( str2,tmp );
        }
       
         CString paths=p->lpDir;
   paths+=str1;
   if (pNotify->Action!=4)
   ...{
    strcpy( str2, "");
   }
  pFsw->GetAllText(pNotify->Action,paths,pFsw->GetTimeString(),str2);
  //写入记录文件
     } 
    return 0;
}