MSComm控件中的OnComm事件在API下怎么实现?

如果串口有数据则会触发MSComm的OnComm事件,这个功能用API来做的话怎么实现或者有什么函数? 问题点数：20、回复次数：2Top

1 楼ookook（黑暗之光）回复于 2005-02-04 16:29:35 得分 5

帮你UPTop

2 楼najzni（najzni）回复于 2005-02-04 17:15:31 得分 15

有api函数，你设置你关系的事件就可以了。  
  SetCommMask  
  The   SetCommMask   function   specifies   a   set   of   events   to   be   monitored   for   a   communications   device.    
   
  BOOL   SetCommMask(  
      HANDLE   hFile,         //   handle   to   communications   device  
      DWORD   dwEvtMask     //   mask   that   identifies   enabled   events  
  );  
     
  Parameters  
  hFile    
  Handle   to   the   communications   device.   The   CreateFile   function   returns   this   handle.    
  dwEvtMask    
  Specifies   the   events   to   be   enabled.   A   value   of   zero   disables   all   events.   This   parameter   can   be   a   combination   of   the   following   values:   Value   Meaning    
  EV_BREAK   A   break   was   detected   on   input.    
  EV_CTS   The   CTS   (clear-to-send)   signal   changed   state.    
  EV_DSR   The   DSR   (data-set-ready)   signal   changed   state.    
  EV_ERR   A   line-status   error   occurred.   Line-status   errors   are   CE_FRAME,   CE_OVERRUN,   and   CE_RXPARITY.    
  EV_RING   A   ring   indicator   was   detected.    
  EV_RLSD   The   RLSD   (receive-line-signal-detect)   signal   changed   state.    
  EV_RXCHAR   A   character   was   received   and   placed   in   the   input   buffer.    
  EV_RXFLAG   The   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   The   last   character   in   the   output   buffer   was   sent.    
  Top

相关问题

• ce
• api
• ev
• 事件
• detect
• communications device
• character
• signal changed state
• event
• specified

• 帖主：maplebridge
• ookook
• najzni

• Visual C++类图书
• Visual C++类源码下载