[Lazarus] Panel Top Negative Limitation

[info at voiceliveeditor.com]

Hi
I have a problem using a panel, that is large say 70000.
If I try to bring areas of this into the view area by using panel.top:=-avalue, this works fine until you hit –32769; at which point the panel vanishes.
How can this be corrected; or is there a workaround?

I have a forum thread; where I have attached simple project demonstrating the problem.
http://forum.lazarus.freepascal.org/index.php/topic,31355.msg200797.html#msg200797

Any thoughts appreciated.

Josh

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