通过支持AT指令集的手机发送短消息（源代码）

通过支持AT指令集的手机发送短消息（源代码）(6)      return( true );
    }
   }
  }
 }
 else {
  Sleep( 100 );
  return( true );
 }
 return( false );
}

DWORD CGSMPhone::ReadComm(char *szBuffer, DWORD dwBufLen)
{
 BOOL bResult = TRUE;
 DWORD dwEvtMask = 0;
 DWORD dwError = 0;
 DWORD dwBytesRead = 0;
 COMSTAT comstat;

 EnterCriticalSection( &m_csComm );
 ClearCommError( m_hIDComDev, &dwError, &comstat);
 if( comstat.cbInQue == 0 ) {
  LeaveCriticalSection( &m_csComm );
  return( 0 );
 }
 dwBytesRead = comstat.cbInQue;

 bResult = ReadFile( m_hIDComDev, szBuffer, dwBytesRead, &dwBytesRead, &m_Overlapped );
 LeaveCriticalSection( &m_csComm );
 if( !bResult ) {
  if( GetLastError() == ERROR_IO_PENDING ) {
   Sleep( 100 );
   WaitForSingleObject( m_Overlapped.hEvent, 2000 );
   GetOverlappedResult( m_hIDComDev, &m_Overlapped, &dwBytesRead, FALSE );
  }
 }
 Sleep( 200 );
 return( dwBytesRead );
}

DWORD CGSMPhone::ReadStringFromComm(char *szBuffer, DWORD dwBufLen)
{
 char szBuf[1024];
 DWORD dwRet = 0;
 while( 1 ) {
  Sleep( 100 );
  memset( szBuf, 0, 1024 );
  dwRet = ReadComm( szBuf, 1024 );
  if( dwRet > 0 ) {
   m_strCommBuffer += szBuf;
   if( m_strCommBuffer.Find( "OK" ) == -1 ) continue;
   if( m_strCommBuffer.Find( '\r' ) > 0 ) break;
  }
  else {
   break;
  }
 }

 if( !m_strCommBuffer.IsEmpty() ) {