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29 lines
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29 lines
1 KiB
Plaintext
{{QBDLDATE:05-20-2022}}
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{{QBDLTIME:23:07:08}}
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{{DISPLAYTITLE:_CONNECTED}}
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The [[_CONNECTED]] function returns the status of a TCP/IP connection handle.
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{{PageSyntax}}
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:{{Parameter|result&}} = [[_CONNECTED]]({{Parameter|connectionHandle&}})
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{{PageDescription}}
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* The handle can come from the [[_OPENHOST]], [[OPENCLIENT]] or [[_OPENCONNECTION]] QB64 TCP/IP functions.
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* Returns -1 if still connected or 0 if connection has ended/failed.
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* Do not rely solely on this function to check for ending communication.
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* Use "time-out" checking as well and [[CLOSE]] any suspect connections.
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* If this function indicates the handle is not connected, any unread messages can still be read using [[GET (TCP/IP statement)|GET #]].
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* Even if this function indicates the handle is not connected, it is important to [[CLOSE]] the connection anyway or important resources cannot be reallocated.
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{{PageSeeAlso}}
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* [[_OPENCONNECTION]]
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* [[_OPENHOST]]
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* [[_OPENCLIENT]]
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* [[_CONNECTIONADDRESS$]]
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* [[Downloading Files]]
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{{PageNavigation}}
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