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Check whether a filedescriptor is set
Source position: bunxovlh.inc line 75
| function fpFD_ISSET( | 
| fdno: cint; | 
| const nset: TFDSet | 
| ):cint; | 
FpFD_Set Checks whether file descriptor fdNo in filedescriptor set fds is set. It returns zero if the descriptor is not set, 1 if it is set. If the number of the filedescriptor it wrong, -1 is returned.
For an example, see FpSelect.
If an invald file descriptor number is passed, -1 is returned.
| 
 | Wait for events on file descriptors | |
| 
 | Clear all file descriptors in set | |
| 
 | Clears a filedescriptor in a set | |
| 
 | Set a filedescriptor in a set |