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getfid

getfid

Purpose
Get the stream number of the active input, output or error stream.
Synopsis
function getfid(stream:integer):integer
Argument
stream 
The stream to query:
F_INPUT 
Input stream
F_OUTPUT 
Output stream
F_ERROR 
Error stream
Return value
Stream number.
Further information
The returned value can be used as parameter for the function fselect.
Related topics
fselect.

Parent Topic Predefined functions and procedures