用于自定义数据/结构体的剪切板应用模板类

//用于自定义格式数据/结构体的剪切板应用模板类template <class MYDATA> class COwnerDataClipboard  {  HWND hClipboardHwnd; //剪切板窗口句柄  UINT uFormat; //剪切板粘贴格式//Trace Error  #define TraceErr(e) \  do{ \    dwErr=GetLastError();\    TRACE( _T(#e) _T(" Error Code:%ld\n"), dwErr);\    ASSERT(FALSE);\  }while(0);public:  COwnerDataClipboard()  {    //以桌面窗口做剪切板窗口句柄    hClipboardHwnd = GetDesktopWindow();     //注册剪切板格式    CString szFormat;    szFormat.Format(_T("ClipBoard_OwnerData%d"), sizeof(MYDATA));        uFormat = RegisterClipboardFormat( szFormat );    if(uFormat == 0)    {      DWORD dwErr = GetLastError();      TRACE( _T("RegisterClipboardFormat failed : %ld\n"), dwErr);      ASSERT(FALSE);    }  }  //链表粘贴到剪切板  BOOL PasteToClipboard(const MYDATA &data)  {    DWORD dwErr = ERROR_SUCCESS;    HGLOBAL hMem = NULL;    BOOL bClipOpened = FALSE;    do     {      //打开剪切板      bClipOpened = OpenClipboard(hClipboardHwnd);      if(!bClipOpened)      {        TraceErr("OpenClipboard");        break;      }      //清空剪切板      if(!EmptyClipboard())      {        TraceErr("EmptyClipboard");        break;      }      //分配所需内存      DWORD dwSize = sizeof(MYDATA); //计算长度      hMem = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, dwSize); //分配内存      if(hMem == NULL)      {        TraceErr("GlobalAlloc");        break;      }      //锁定内存      MYDATA *pData = (MYDATA*)GlobalLock(hMem);       if(pData == NULL)      {        TraceErr("GlobalLock");        break;      }      //拷贝数据至内存      *pData = data;      //解锁内存      if(!GlobalUnlock(hMem) && GetLastError() != ERROR_SUCCESS)      {        TraceErr("GlobalUnlock");        break;      }      if(SetClipboardData(uFormat, hMem) == NULL)      {        TraceErr("SetClipboardData");        break;      }        } while (0);    //出错释放内存    if(dwErr && hMem)    {      GlobalFree(hMem);      hMem = NULL;    }      //关闭剪切板    if(bClipOpened)      CloseClipboard();    return dwErr == ERROR_SUCCESS;  }  BOOL CopyFromClipboard(MYDATA &data)  {    DWORD dwErr = ERROR_SUCCESS;    BOOL bClipOpened = FALSE;    do     {      //打开剪切板      bClipOpened = OpenClipboard(hClipboardHwnd);      if(!bClipOpened)      {        TraceErr("OpenClipboard");        break;      }      if(!IsClipboardFormatAvailable(uFormat))//检查格式有效        {        TraceErr("IsClipboardFormatAvailable");        break;              }      HGLOBAL hMem = GetClipboardData(uFormat);//读取数据句柄       if(hMem == NULL)      {        TraceErr("GetClipboardData");        break;      }      //锁定内存      MYDATA *pData = (MYDATA *)GlobalLock(hMem);       if(pData == NULL)      {        TraceErr("GlobalLock");        break;      }      //拷贝数据至内存      data = *pData;            //解锁内存      if(!GlobalUnlock(hMem) && GetLastError() != ERROR_SUCCESS)      {        TraceErr("GlobalUnlock");        break;      }        } while (0);      //关闭剪切板    if(bClipOpened)      CloseClipboard();    return dwErr == ERROR_SUCCESS;  }};

//应用测试//测试结构体typedef struct tagMYSTRUCT_t{  int a, b, c;    tagMYSTRUCT_t()  {    a = b = c = 0;  }  tagMYSTRUCT_t(int a1, int b1, int c1)  {    a = a1; b = b1; c = c1;  }  tagMYSTRUCT_t( tagMYSTRUCT_t & other)  {    memcpy(this, &other, sizeof(*this));  }  }MYSTRUCT, *LPMYSTRUCT;void TestOwerClipboard(){  MYSTRUCT myData1(1, 2, 3), myData2;  COwnerDataClipboard < MYSTRUCT > myClip;  myClip.PasteToClipboard(myData1);  myClip.CopyFromClipboard(myData2);  ASSERT(memcmp(&myData1, &myData2, sizeof(MYSTRUCT)) == 0);}