Shoutbox

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!

Nice one! Thanks for sharing.

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!

Wow, excellent written tut .....

Nice one

Btw, shouldn't this one be sticky?

It is half stickied: http://shoutbox.menthix.net/important.php

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!

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I should be able to come up with a generic subclassing helper DLL sooner or later

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?

quote:

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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?

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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.

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?