Ccomptr idispatch queryinterface firefox

Ccomptr is a convenient smart pointer atl class to manage reference counting of com objects. From msdn, dispinterface is another interface inherits from idispatch. Queryinterface for iretrieveapplication and use setapplicationobject to pass in the idispatch of the acad app. I admit i havent read all article in this thread but i think i have an implementation solution for multiple dual interfaces on one class. The general rule of thumb is to use nscomptr when t is an interface type, and refptr when t is a concrete type this basic rule derives from the fact that some of the nscomptr code is factored. The following example shows how to use ccomptr to instantiate a com object.

Thanks pete, good to know theyre good for something. Im probably jumping into this topic a bit late but it doesnt seem to end. However, using a smart pointer provides some advantages over using a raw pointer. And when we declare dispinterface someinterce, then it means someinterface. General rule of thumb for nscomptr versus refptr the general rule of thumb is to use nscomptr when t is an interface type, and refptr when t is a concrete type. To detect this, you have to search through all the elements in the document object and find out if there is any element thats of type password.

Ive been trying to research the windows scripting technologies but im having difficulty finding exactly what i need. The cached tearoff macro uses the ccomcachedtearoffobject atl class, and this makes use of the getcontrollingunknown function, so you also need to add this macro to the outer object class. The size estimate is exactly correct for simple types int, long, double, and so on. Tips for debugging com addrefrelease leaks its compiling. Because smart pointers are typically automatic variables rather than dynamically allocated variables, they are automatically cleaned up when they go out of scope. So at first i started developing providers with atl and throughout the process i learned few tips id like to share here. The visual basic runtime performs this step regardless of whether the client uses the interface. Ccomptr is used for managing objects that surely support some interface. Atls interface map is comprised of three kinds of macros you can see in this code. If you get this working then let me know and there are a few optimizations that can be made to take advantage of protocol extension. The ccomptr and ccomqiptr classes can help eliminate memory leaks by performing automatic reference counting. After that, this new ccomptr object can be used as an interface pointer itself. A smart pointer is an object that behaves like a pointer. We have customers asking for vbscript functions to be called when particular actions occur within our product.

So i switched to firefox 2 and waiting for the release of the amazing firefox 3. If you find one, we are almost sure that this is a login page. This guide provides some explanation and advice on how to choose between them. The following information is intended for system administrators. Using a dispid is most efficient, but least convenient because you. As you can see, its a simple class that implements the idispatch interface. Idispatch invokeopenold0000000c failed werr 0x800a141f or hotdocs was unable to open the document in microsoft word. This article contains information about opening or modifying the registry. Ccomptr iunknown piunknown, iid iid construct a new ccomptr object with an iunknown pointer and an iid, which represents the interface you are interested in. The latest version of firefox and netscape also support this by passcard. We may provide objects within the scripts namespace for it to access information about our product as well.

For variants that contain interface pointers, ccomvariant does a queryinterface for the ipersiststream or ipersiststreaminit interfaces and uses the getsizemax method to figure out the size. The idispatch interface performs its own release, so the code above calls release twice, the first time explicitly through the call dispatchrelease and the second time implicitly at the functions closing curly. An interface based solely on idispatch is called a dispinterface. The most serious of these problems is the performance of idispatch based components. Well the best way is to get your idispatch interface directly with its clsid. Finally, the visual basic runtime calls queryinterface one more time to obtain the desired interface by passing the iid for idog. That is, you can use an instance of a smart pointer class in many of the places you normally use a pointer. All of the methods of cdispatchptr take a first argument that specifies which member i. Internally, a constructor will call piunknown queryinterface to fetch the interface pointer according to. Oct 06, 2015 at this point, ive tried the methods laid out in the solidworks api help, but have gotten nowhere. But if you want to do that you can use queryinterface to get idispatch pointer but that. However, it seems that sometimes smart pointers are too smart in particular, im referring to the secret queryinterfaceing assignment operator discussed by.

Topics and sub topics for this tutorial are listed below. An introduction to active template library atl part 2 tenouk. Components using idispatch can be accessed in two slightly different ways, known as early binding and late binding. Accessing mozillas isimpledomnode by using iaccessible stack. Check type using queryinterface in vb this would be typeof x is y static void checktype ccomptr idispatch geom. Internally, a constructor will call piunknownqueryinterface to fetch the interface pointer according to. Ihtmlelement and ihtmlelementcollection solutions experts. Firefox team is spreading its popularity by this announcement as most of firefox users will talk about it, more users will be interested in trying firefox if they were not using it and firefox will gain more popularity. Ccomqiptr is for cases when you want to call queryinterface in a convenient manner to know whether an interface is supported.

Internally constructor will call piunknown queryinterface to fetch interface pointer according to the iid. The customer would specify a vbscript file, which we would load, and whenever a particular event occurs, wed call a particular function in the vbscript and let it do its thing. The use of ccomptr and ccomqiptr simplifies the syntax of the application by reducing the calls to addref, release, and queryinterface sprinkled throughout the code. Now, microsoft will implement a ballot screen that will be shown the first time a user starts internet explorer. When you implement one or more userdefined interfaces in a class, visual basic provides an implementation of queryinterface that allows clients to move among interface references. Obtaining iaccessible2 interface for firefox thunderbird window. The next line will always have a successful hr value because it comes from the previous success already checked and not from the queryinterface call. Include for oc, gets common headers when precompiled headers are enabled. However, it seems that sometimes smart pointers are too smart in particular, im referring to the secret queryinterfaceing assignment operator discussed by jared parsons on his blog. Web applications will not work correctly with internet explorer 7 or firefox 2. However, the second version may be less errorprone because it uses the ccomptr class. I have tried firefox beta 1 and it was very inspiring.

However, none of these techniques has proved satisfactory in the long run. How to assign an idispatch element solidworks forums. Anyway, i was reading his blog and came across this post. The most serious of these problems is the performance of idispatchbased components. You can pass any one of the following three data types for this parameter a regular ansi string, e. Application which you can then use to obtain itypeinfo, itypelib pointers to enumerate all the stuff. To get around the oneinterfaceperobject limitation, some developers have built hacks by which queryinterface style semantics can be built into a dispinterface or have suggested identity tricks that allow multiple idispatch interfaces to be implemented by one object. This page was last modified on 28 march 2012, at 19. Ccomptr provides a specialization for idispatch that enables it to store. Gecko code uses both nscomptr and refptr as smart pointers.

I am looking to port my firefox and chrome addon into an ie addon. But if you want to do that you can use queryinterface to get idispatch pointer but that is not converting you will be getting a new pointer. Because ccomptr and ccomqiptr do not hide calls to addref and release, this blind conversion causes a problem when the release is called through the dispatch smart pointer. Firefox through the msaa interface are not sufficient for hyperbraille. This document describes the right way to write queryinterface. Originally, idispatch was designed so that every call to idispatchinvoke to. That ballot screen gives the user the option to select a different browser like firefox, safari, chrome, opera and so.

That page actually recommends queryinterfaceing into a ccomptr, where you get an hresult stating what failed, over using ccomqiptr, where you always get nullptr and you have no idea why interface not implemented. How do i get the url from current active tab in internet. I want to modify the sample so i maintain a pointer to the com object cdevelopercollection, not the interface, idevelopercollection. Constructs a new ccomptr object with an iunknown pointer and an iid. The following functions both do the same logical operations. This way you can request an interface from a pointer to any unrelated com interface and check whether that request succeeded. The vtable of a dispinterface is identical to that of idispatch itself.

In windows environment, adding an accessibility support to a program means youll have to do a lot of com coding. The interface has only one method, which is responsible for handing out new stuffs. For example, irawelementprovidersimple is the most fundamental interface you should implement for every provider. Pete warden left a comment on my blog that hes porting a firefox extension to ie and that he appreciates the articles i wrote about ie addon development. Find answers to ihtmlelement and ihtmlelementcollection from the expert community at experts exchange. Registry modifications are irreversible and could cause system failure if done incorrectly. Hi, if you want to find out all possible objects then you need a idispatch pointer to excel. In this sample well use the queryinterface function could use ccomqiptr as well and itypeinfo to get the type name of the object. Delphi dreamweaver drupal facebook firefox flash flex frameworks. Since all browsers are written in different ways there is no answer for this question. I read some msdn document and some other forum discussions about the differences between idispatch and dispinterface, but still confused. The problem here is that if the idispatch is null then the hr is never set by the line that fetches the irequest pointer. How to get that idispatch interface you can read more here.

Deriving from idispatch would only complicate matters without any benefit. When clients ask an object for one of its interfaces via queryinterface, atl looks to this map to find the interface. Ihtmlcontrolrange,prangeexeccommandstrcopy, false, vempty, null. Feb 22, 2006 after that this new ccomptr object can be used as interface pointer itself. Apr 17, 2003 april 17, 2003 tools hello idispatch lovers. Windows 7 e was planned for the eu to be a windows 7 version without internet explorer. An introduction to active template library atl part 2. Errorchecking routine that performs manual lifetime management of a com.