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JRowe

DLLCallBackRegister

6 posts in this topic

I'm wondering what it does. I think, from working with the low level mousehook, that whenever a function that's been registered as a callback is called in an external dll, that function is redirected to an AutoIt function.

Let's say there's an Application that uses ExampleDLL with someFunction().

someFunction() takes two integers as params and adds them, in the c++ DLL.

I set someFunc() as a callback using DllCallbackRegister, then redirect it to a function that multiplies the parameters instead.

I start the application, then I start my script.

When I use the application, is someFunc() going to return the value from the AutoIt callback function?

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The callback is based on work done by picasso. The implementation could have changed, but I'm pretty sure it hasn't.

http://www.autoitscript.com/forum/index.php?showtopic=50768&st=0&p=384128&fromsearch=1&#entry384128


Broken link? PM me and I'll send you the file!

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So in the example scenario I posted, is someFunc() gonna return the autoit script's value inside the other application? Or is that what hooking is for? Sorry if I'm being dense, I read through the thread and didn't see anything pertaining to that question.

The reason I ask is that I have an application that makes extensive use of a user created dll. If I could create functions in that dll that called AutoIt functions in turn, it would make me a very happy man.

Thanks, monoceres. :)

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If I understood you correctly, you want to replace an exported function in a dll with a autoit callback?

If so, then it's very possible, in fact, it's the exact thing I'm doing in the IAT api hooking script I've posted here (check my sig). trancexx also have done work with this in his resource hacker project.


Broken link? PM me and I'll send you the file!

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Awesome! Could you pm me that c++ function?

Sure, just let me find it first, I've reinstalled my system several times since then so it's probably in a backup dir somewhere.


Broken link? PM me and I'll send you the file!

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