Hi,

Had a question regarding COM,

When we create an instance of interface using CoCreateInstance then the pointer returned by this API is suppose "x".

CoCreateInstance(target, NULL, flags, IID_IDispatch, tmpObj)

where "x" is "tmpobj"

Does X point to virtual function table?

does *(x) point to QueryInterface ; and
*(x+4) point to AddRef;
etc......

Is this assumption correct?

Can't find any resources for this. Appreciate any kind of help.

http://blogs.msdn.com/oldnewthing/archive/2004/02/05/68017.aspx

thanks man, i hope it was not too easy to find

No problem, had it bookmarked!

OK, since we're talking about COM here, I can ask my stupid question.

Is there a util which will list all the methods/variables available in a COM object (Outside of object explorer in Visual Studio)?

A nice little .exe that just dumped out the info would be ideal! Does such a thing exist?

http://www.japheth.de/COMView.html

WOW! Thanks disavowed, that's one badass app.

No problem. It's also open source, effectively, since it was written in ASM

thanks for the link, this link wud have saved a lot of effort for me, , i had to write code for this, if ur interested in writing code for this u can use tlbinf32.dll, which is a activex component, this will extract the typelib info for u.

But this will not give u the VFtable address etc.

U need to use CoCreateInstance to get the interface address and then follow two redirections to get to the Vftable.

There are of course a bunch of other useful COM apps in the CRCETL too, in addition to COMView:

http://www.woodmann.com/collaborative/tools/Category:COM_Tools