quote:
Originally posted by deAd
quote:
Originally posted by CookieRevised
Isn't the reason you want to subclass something because you need to catch just a certain message? I don't see why you would want to catch all possible messages there are, that would be useless (unless you make a Windows Message Spying program).
Yes, but you have to send the messages you don't want back to the original windowproc. You can't do this with a Plus! window because you only have control over the messages you ask for.
But aren't all other messages already forwarded to the original WinProc by Plus!?
Though I know this wouldn't work in all situations either though, and it is a bit of a dirty method. But I think this might be possible for specific things
EDIT: Plus! doesn't know the original WinProc, that would of course be the reason, no?
quote:
Originally posted by Patchou
As for using GetCallbackPtr with SetWindowLong: don't. The documentation specifically mentions that this function can only be used for synchronous calls. If you make a script that defys this rule, it may work at first but the combination of several scripts will certainely cause unexpected results / crashes.
I know this would be a lot to ask, but can you explain this in more detail and/or with an example, as I like to understand in much detail why it would cause a crash/unexpected results in some cases.
EDIT: apparently not possible
Just had a quick chat with Patchou. In short:
quote:
Originally posted by Patchou
the problem is a technical limitation: for callbacks I dont have much other choice than using static functions in my code so I cant have two scripts using a callback at the same time, which is why they have to be synchronous.
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Thus right now, calling GetCallbackPtr() many times, from different scripts, will always return the same pointer for a function with a given number of arguments.
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Meaning two scripts can't subclass any two window at the same time. Even one single script wouldn't be able to subclass two windows with that method.
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Now, he also gave a hint as in how it would be possible, but that involves asm (which _is_ possible in scripting, but extremely advanced).
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