Does "close" ever set an error?

[mark smit]

Hello all,

Well here I am with another installment of...

STUPID POWERBASIC QUESTIONS!!! yaaaa!


Anyway, I was wondering if there is ever any need to check for
an error when using "CLOSE" in PBDLL. I think it would be really
usefull if we could get a list of possible error codes for each
PowerBasic keyword.


Thanks again!

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Cheers

[Gregery D Engle]

I don't think that the compiler creates any error messages for close.

You can even do this and it won't bomb out:

function pbmain()
Close #2
Close #7
end function

I think the only error that would be caused is a syntax error like
this:

function pbmain()
    close [b]&2]/b]
    close #7
end function

The only other thing I can think of is:

function pbmain()
    open "blah" for binary as #55
    close #56
    open "blah2" for binary as #55
    close #55
end function

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-Greg

[Egbert Zijlema]

Gregery,

I don't think this is what Mark has in mind.
He wants to know (correct me if I'm wrong, Mark) whether a Basic keyword leaves a message behind in the form of a so called 'error level' code.
It would be vere interesting, indeed, to know those codes!
If they exist.
Regards,

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mailto:[email protected][email protected]</A>
www.basicguru.com/zijlema/

[Eric Pearson]

Mark --

> any need to check for an error when using "CLOSE"

Yes. For example, if M: is a mapped network drive...

FUNCTION PBMain
    OPEN "M:\TEMP.TXT" FOR OUTPUT AS #1 
    PRINT #1,"HELLO"
    PRINT "Kill the network connection now, then press a key..."
    WAITKEY$
    CLOSE #1
    PRINT ERR
    WAITKEY$
END FUNCTION

...will display an ERR number that was generated by the CLOSE statement.

-- Eric

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Perfect Sync: Perfect Sync Development Tools
Email: mailto:[email protected][email protected]</A>



[This message has been edited by Eric Pearson (edited October 07, 2000).]

[Tom Hanlin]

The error codes returned by the compiler depend on the error codes
returned by the operating system. This can vary considerably even
on the assorted Windows flavors: 95, 98, Me, NT, 2000. So, we can't
really provide a definitive list of what errors may be returned by
a given BASIC keyword.


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Tom Hanlin
PowerBASIC Staff