Intel® Fortran Compiler Classic and Intel® Fortran Compiler Developer Guide and Reference
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SPORT_PEEK_DATA
Serial Port I/O Function: Returns information about the availability of input data. This routine is only available for Windows.
Module
USE IFPORT
result = SPORT_PEEK_DATA (port [,present] [,count])
port  |  
      (Input) Integer. The port number.  |  
     
present  |  
      (Output; optional) Integer. 1 if data is present, 0 if no data has been read.  |  
     
count  |  
      (Output; optional) Integer. The count of characters that will be returned by SPORT_READ_DATA.  |  
     
Results
The result type is INTEGER(4). The result is zero if successful; otherwise, a Windows* error value.
CR and LF characters may not be returned depending on the mode specified in the SPORT_CONNECT( ) call.
Example
USE IFPORT
INTEGER(4) iresult
INTEGER    present
INTEGER    count
iresult =  SPORT_PEEK_DATA( 2, present, count )
END 
  See Also
Communications and Communications Functions in the Microsoft* Platform SDK