OpenEuphoria

Re: getItem() and getLVSelectedText bug!!!!

• Posted by Derek Parnell <ddparnell at bigpond.com> May 12, 2002
• 371 views

----- Original Message -----
From: "jordah ferguson" <jorfergie03 at yahoo.com>
To: "EUforum" <EUforum at topica.com>
Subject: getItem() and getLVSelectedText bug!!!!


>
>
> Hi Derek,
>
> I have had a tough time with the routines above in your new win32lib.
> Every time i select an item
> from a listview and i call getItem or getLVSelectedText(). I get a
> windows Application error
> message box saying...."The Instructions at 00415105 referenced memory at
> ffffffff. The memory
> could not be read from"
>
> Please check for a fix on this as the above routines are very vital.

Yep, this was a bug. I'd assumed that the sendMessage() call to get the text
from a column would return a Zero if the column didn't exist. However it
doesn't. Instead it sets the text address to -1 (#FFFFFFFF) so I was trying
to read from that non-existant address. The fix is actually in tk_mem.e
where I now check if I can read the address before extracting the text
there.

There were a couple of other subtle ones with listviews too. Hopefully I've
fixed these now.
-------------
Derek.