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1 votes - 5 average   Tutorial on How to Let a Script-Callable DLL Handle Scripting Objects
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Mnjul
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O.P. Tutorial on How to Let a Script-Callable DLL Handle Scripting Objects
Hello everyone!

I've just finished the tutorial on how to let a DLL, which is Interop.Call()ed by scripts, interface with Plus! scripting objects.

This tutorial guides script developers to have their native Win32 DLLs manipulate scripting objects (MsgPlus, Messenger, ChatWnd, Contact, PlusWnd, ...) as in JScript. We know that DLLs are crucial to implement asynchronous callbacks, which are in term crucial to subclassing non-Plus! windows (aside from machine-code-injection). However, before this tutorial, it was never (I think) disclosed how DLLs can interact with scripting objects in their native C++ codes. This is also the very technique that enables HopperLive to change Messenger's status and create a PlusWnd in its DLL.

If you're interested, please take a look! And tell me what you think about it, especially if you feel something is left unsaid, is not clear, or if you want more detail on specific topics. Requests for specific examples are welcome too!

Happy reading!

This post was edited on 03-08-2012 at 09:53 AM by Mnjul.
05-03-2010 04:06 PM
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Menthix
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RE: Tutorial on How to Let a Script-Callable DLL Handle Scripting Objects
Nice one! Thanks for sharing.
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05-04-2010 01:47 PM
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Matti
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RE: Tutorial on How to Let a Script-Callable DLL Handle Scripting Objects
Bookmarked! I have yet to find a script project where I need to use an extra DLL to do what I need, but if I do I now have a place to start.

Thank you for this excellent write-up! :)
Plus! Script Developer | Plus! Beta Tester | Creator of Countdown Live | Co-developer of Screenshot Sender 5

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05-04-2010 04:01 PM
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CookieRevised
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RE: Tutorial on How to Let a Script-Callable DLL Handle Scripting Objects
Wow, excellent written tut (y)(y)(y).....
.-= A 'frrrrrrrituurrr' for Wacky =-.
05-04-2010 06:05 PM
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SmokingCookie
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RE: Tutorial on How to Let a Script-Callable DLL Handle Scripting Objects
Nice one (Y)

Btw, shouldn't this one be sticky?
05-04-2010 07:11 PM
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matty
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RE: Tutorial on How to Let a Script-Callable DLL Handle Scripting Objects
It is half stickied: http://shoutbox.menthix.net/important.php
05-04-2010 07:39 PM
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Mnjul
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O.P. RE: Tutorial on How to Let a Script-Callable DLL Handle Scripting Objects
Hello folks,

I've updated the tutorial, briefing on how to let the DLL call back JScript function. It's in the tutorial's last section under the name of Advanced Topics. Special thanks to Eljay for shedding some light on the mechanism! ;)

I should be able to come up with a generic subclassing helper DLL sooner or later :chrongue:
05-08-2010 04:22 PM
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SmokingCookie
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RE: Tutorial on How to Let a Script-Callable DLL Handle Scripting Objects
Ref: C# DllExportAttribute.

Okay, I've got absolutely no idea how the above thingy supposed to work, but can this tutorial be applied to C# as well?
05-09-2010 08:09 AM
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Mnjul
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O.P. RE: Tutorial on How to Let a Script-Callable DLL Handle Scripting Objects
quote:
Originally posted by SmokingCookie
Ref: C# DllExportAttribute.

Okay, I've got absolutely no idea how the above thingy supposed to work, but can this tutorial be applied to C# as well?

Well, I just tried in Visual Studio to add MsgPlusLive.dll to the C# project Reference, and it refused to do so. As long as you can extract the Type Library (.tlb) from the DLL then things should be ok. You have to find a way though. Dunno if any Visual Studio-builtin command tools do this.
05-09-2010 08:30 AM
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RE: Tutorial on How to Let a Script-Callable DLL Handle Scripting Objects
I remember that regasm has some command-line argument that exports a .tlb file; could that be what you're pointing at?

Doesn't Patchou have anything like a .tlb file? :P

This post was edited on 05-09-2010 at 10:05 AM by SmokingCookie.
05-09-2010 08:34 AM
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