The _CONNECTED function returns the status of a TCP/IP connection handle.

Syntax

result& = _CONNECTED(connectionHandle&)

Description

• The handle can come from the _OPENHOST, OPENCLIENT or _OPENCONNECTION QB64 TCP/IP functions.
• Returns -1 if still connected or 0 if connection has ended/failed.
• Do not rely solely on this function to check for ending communication.
• Use “time-out” checking as well and CLOSE any suspect connections.
• If this function indicates the handle is not connected, any unread messages can still be read using GET (TCP/IP statement).
• Even if this function indicates the handle is not connected, it is important to CLOSE the connection anyway or important resources cannot be reallocated.

See Also

• _OPENCONNECTION
• _OPENHOST
• _OPENCLIENT
• _CONNECTIONADDRESS$
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