| 术语 | getcommmask |
| 释义 | GetCommMask 语法： C++ BOOL WINAPI GetCommMask( __in HANDLE hFile, __out LPDWORD lpEvtMask ); GetCommMask功能 检索值指定通信设备的事件掩码。 参数 hFile [in] 一个句柄，通信设备。 CreateFile函数返回此句柄。 lpEvtMask [out] 一个指针变量接收的事件掩码，目前启用。此参数可以是一个或多个下列值。 ValueMeaning EV_BREAK 0x0040A打破上检测输入。 EV_CTS 0x0008The中旅(明确到发送)改变了状态的信号。 EV_DSR 0x0010The DSR(数据设置就绪)信号改变状态。 EV_ERR 0x0080A线状态错误发生。线路状态错误CE_FRAME，CE_OVERRUN和CE_RXPARITY。 EV_EVENT1 0x0800An事件的第一供应商的特定类型的发生。 EV_EVENT2 0x1000An事件第二供应商的特定类型的发生。 EV_PERR 0x0200A打印机错误发生。 EV_RING 0x0100A环指标检测。 EV_RLSD 0x0020The RLSD(接收线信号检测)信号改变状态。 EV_RX80FULL 0x0400The接收缓冲区充满百分之八十。 EV_RXCHAR 0x0001A的性质是接获和输入缓冲区内。 EV_RXFLAG 0x0002The事件的性质是接获和输入缓冲区内。事件中指定的字符设备的DCB结构，适用于使用SetCommState函数到串行端口。 EV_TXEMPTY 0x0004The在输出缓冲区的最后一个字符被送往。 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。为了获得更多错误信息，调用GetLastError。 备注 该GetCommMask函数使用一个掩码变量来表示，可用于特定的通信资源监测事件。一个句柄，通信资源，可以在调用中指定的WaitCommEvent功能，为一个等待事件发生。要修改的通信资源的事件掩码，使用SetCommMask功能。 要求： 最低支持：client－Windows 2000专业版 最低支持server－Windows 2000服务器 HeaderWinbase.h(头文件：winuser.h) LibraryKernel32.lib DLLKernel32.dll 参见 通讯功能 通信资源 CreateFile 二氯苯 SetCommMask WaitCommEvent 如果有任何问题和意见，请发送给微软(wsddocfb@microsoft.com) 生成日期：2009年7月30日 ＝＝英文原文＝＝GetCommMask Function Retrieves the value of the event mask for a specified communications device. Syntax C++ BOOL WINAPI GetCommMask( __in HANDLE hFile, __out LPDWORD lpEvtMask ); Parameters hFile [in] A handle to the communications device. The CreateFile function returns this handle. lpEvtMask [out] A pointer to the variable that receives a mask of events that are currently enabled. This parameter can be one or more of the following values. ValueMeaning EV_BREAK 0x0040A break was detected on input. EV_CTS 0x0008The CTS (clear-to-send) signal changed state. EV_DSR 0x0010The DSR (data-set-ready) signal changed state. EV_ERR 0x0080A line-status error occurred. Line-status errors are CE_FRAME, CE_OVERRUN, and CE_RXPARITY. EV_EVENT1 0x0800An event of the first provider-specific type occurred. EV_EVENT2 0x1000An event of the second provider-specific type occurred. EV_PERR 0x0200A printer error occurred. EV_RING 0x0100A ring indicator was detected. EV_RLSD 0x0020The RLSD (receive-line-signal-detect) signal changed state. EV_RX80FULL 0x0400The receive buffer is 80 percent full. EV_RXCHAR 0x0001A character was received and placed in the input buffer. EV_RXFLAG 0x0002The event character was received and placed in the input buffer. The event character is specified in the device's DCB structure, which is applied to a serial port by using the SetCommState function. EV_TXEMPTY 0x0004The last character in the output buffer was sent. Return Value If the function succeeds, the return value is nonzero. If the function fails, the return value is zero. To get extended error information, call GetLastError . Remarks The GetCommMask function uses a mask variable to indicate the set of events that can be monitored for a particular communications resource. A handle to the communications resource can be specified in a call to the WaitCommEvent function, which waits for one of the events to occur. To modify the event mask of a communications resource, use the SetCommMask function. Requirements Minimum supported clientWindows 2000 Professional Minimum supported serverWindows 2000 Server HeaderWinbase.h (include Windows.h) LibraryKernel32.lib DLLKernel32.dll See Also Communications Functions Communications Resources CreateFile DCB SetCommMask WaitCommEvent Send comments about this topic to Microsoft Build date: 7/30/2009 ＝＝原始网址＝＝http://msdn.microsoft.com/en-us/library/aa363257(VS.85).aspx\n |
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