| 术语 | ddefreedatahandle |
| 释义 | DdeFreeDataHandle 语法： BOOL DdeFreeDataHandle( HDDEDATA hData ); DdeFreeDataHandle功能 该DdeFreeDataHandle函数释放一个动态数据交换(DDE)对象和删除数据处理与对象关联。 参数 hData [在，出]句柄DDE的对象被释放。这种处理，必须是被以前的调用DdeCreateDataHandle功能的DdeClientTransaction函数返回或创建。 返回值 如果函数成功，返回值为非零。 如果函数失败，返回值是零。 该DdeGetLastError函数可用于获得错误代码，它可以是下列值之一： DMLERR_INVALIDPARAMETER DMLERR_NO_ERROR 备注 应用程序必须调用在下列情况下DdeFreeDataHandle： 为了摆脱一个DDE对象通过调用DdeCreateDataHandle函数，如果该对象的数据处理，未能通过应用程序到另一个动态数据交换管理库(DDEML的)函数分配的应用 为了摆脱一个DDE对象，在指定的DdeCreateDataHandle调用HDATA_APPOWNED旗分配的应用 为了摆脱一个DDE对象，其处理程序收到DdeClientTransaction函数 系统会自动释放的无主对象的句柄时返回一个DDE回调函数或者是作为一个DDEML函数的参数。 功能信息 最低DLL版本 user32.dll 在Ddeml.h HeaderDeclared，头文件：winuser.h import libraryUser32.lib 最低操作系统Windows 95，Windows NT 3.1 参见 动态数据交换管理库概况，DdeAccessData，DdeCreateDataHandle，DdeClientTransaction ＝＝英文原文＝＝DdeFreeDataHandle Function The DdeFreeDataHandle function frees a Dynamic Data Exchange (DDE) object and deletes the data handle associated with the object. Syntax BOOL DdeFreeDataHandle( HDDEDATA hData ); Parameters hData [in, out] Handle to the DDE object to be freed. This handle must have been created by a previous call to the DdeCreateDataHandle function or returned by the DdeClientTransaction function. Return Value If the function succeeds, the return value is nonzero. If the function fails, the return value is zero. The DdeGetLastError function can be used to get the error code, which can be one of the following values: DMLERR_INVALIDPARAMETER DMLERR_NO_ERROR Remarks An application must call DdeFreeDataHandle under the following circumstances: To free a DDE object that the application allocated by calling the DdeCreateDataHandle function if the object's data handle was never passed by the application to another Dynamic Data Exchange Management Library (DDEML) function To free a DDE object that the application allocated by specifying the HDATA_APPOWNED flag in a call to DdeCreateDataHandle To free a DDE object whose handle the application received from the DdeClientTransaction function The system automatically frees an unowned object when its handle is returned by a DDE callback function or is used as a parameter in a DDEML function. Function Information Minimum DLL Versionuser32.dll HeaderDeclared in Ddeml.h, include Windows.h Import libraryUser32.lib Minimum operating systemsWindows 95, Windows NT 3.1 See Also Dynamic Data Exchange Management Library Overview , DdeAccessData , DdeCreateDataHandle , DdeClientTransaction ＝＝原始网址＝＝http://msdn.microsoft.com/en-us/library/ms648752(VS.85).aspx\n |
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