How to Properly Destroy Quicktime ActiveX Object?

Hi,
Does anyone have experience with Quicktime ActiveX objects? I'm having an issue about destroying/unloading the objects. When my compiled executable is closed (either programtically through 'Quit Labview' or by selecting 'File-->Exit'), Windows 7 detects a crash and displays:
So I'm guessing that Quicktime is the culprit because of the 'Fault Module Name'.
When I shutdown the Quicktime portion of the program (a subvi that gets called several different times), I perform:
QTOLibrary.IQTMovie.Stop
QTOLibrary.IQTMovie.Disconnect
Set QTOControlLib.IQTControl.URL = [blank]
QTOControlLib.IQTControl.QuickTimeTerminate
Destroy QTOControlLib.IQTControl reference
Destroy QTOLibrary.IQTMovie reference
Destory QuickTime ActiveX container reference
Any other properties/methods/combinations/order I should try? Thanks.
-Joe

Hi Joe,
Quit LabVIEW shuts down LabVIEW, but does not affect other applications. You need to ensure that your ActiveX references are being closed properly, even if you are quitting LabVIEW.
A good way to ensure that your references are being closed even when you forcibly exit LabVIEW is to use an event structure. Add a new event to the event structure by right clicking on the default "Timeout" label at the top and selecting "Add Event Case...". Then, under the Event Source, "<Application>", select the event, "Application Instance Close". This event will only execute when you attempt to close your application. Add another "Close Reference" function to the block diagram and wire the reference out output of the Invoke node to the reference input of the Close Reference function. Does this fix your error?
Julianne K
Systems Engineer, Embedded Systems
Certified LabVIEW Architect, Certified LabVIEW Embedded Systems Developer
National Instruments

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Hi,
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It seems I spend more time correcting IE issues than for all of the other mentioned browsers combined.

Thanks for the reference. I use nearly no JS anymore, since it often causes problems with true xhtml served properly even when you use external script files. Often one can use php script on the server and avoid these problems. When one serves as true xhtml using the correct mime type of application/xhtml+xml, the page is parsed with a very strict xml parser rather than a loose-as-a-goose html parser. (If one serves a page written in xhtml code as mime text/html, as is incorrectly done perhaps 99% of the time, you are using only html, not xhtml, and are fooling only yourself. The page is parsed as html instead of xhtml.) The xml parser has to be very strict to account for any possible xml content. Even a single, or even several, errors often will not prevent a html page from showing, but even a single error on an xhtml page served properly will often get an error report from the xml parser rather than a view of the page. One of the most laughable examples of misunderstanding of this issue is the home page of Microsoft. It claims to be xhtml. However it is served as text/html and thus would be better written in html 4.01 in the first place. Moreover, if you validate the page as xhtml at w3c, you find hundreds of xhtml errors. If Microsoft served their home page properly as application/xhtml+xml it of course would not work on any IE browser, at least through IE7, since none of these IE browsers can handle true xhtml. In addition the page likely would not show up on any browser if served as true xhtml until all of the hundreds of xml and other errors on the page were corrected. Instead, one likely would get a very long error report rather than a view of the page.
Back to JS, document.write will not work in properly served xhtml, because it easily could produce code with XML errors. For instance it might produce code that contains an unclosed tag, which is a major xml error that can cause an xml device to malfunction. The xml parser thus rightly finds document.write as an error and prevents viewing of the page. However one often can generate the same code as document.write would produce on a browser with php on the server. The finished code is what gets downloaded to the browser, so the xml parser can check everything in the finished code rather than quess what a JS document.write might produce. And don't think you can sweep document.write under the rug by using an external JS file. The very strict xml parser finds it.
Of course embed has never been a w3c tag, but rather is a bad hangover from the browser war era, a gift of Netscape. No page that includes embed can validate as w3c xhtml or xml of any flavor, at least through xhtml 1.1. However the page may work, despite the error, if server as text/html.
All I know is that something has happened recently that has caused my problem to surface. It likely has to do with some change in the XP OS or IE browser. I have tried viewing several pages written by others that use many types of code for .mov, and all of them I have viewed that use an ActiveX embed for the benefit of IE now have the problem I mentioned. If anyone else with XP and nearly all updates, including the very recent one I mentioned, and the most recent version of QT has had this problem, I could be more confident that the problem comes from an external source. If not, it is still possible the sudden change could be something concerning a specific issue that has developed in my computer.
Again, thanks for the JS reference. Some of this likely can translate into php so I can compare how the JS and php server script I am using relate.

ActiveX Object references - casting to a specific instance

I have some ActiveX controls that are used to interface between a vendors hardware. The activex controls are quite heavy weight in that at any one time there should only be one instance of each of the type of controls within the program.
What I want to do is keep the activex controls in the top level vi and pass references to sub-vi's in order to do property changes or method calls on the activex objects.
When I create an activex reference control in a sub vi it doesnt seem to know what methods/propertys are available on that reference. I beleive it needs casting/converting to a reference that will allow LabView to recognize the reference type but im not sure how to do this.
Thanks
TMC

Your automation refnums are probably not linked to the ActiveX control. Try this... select a property node in your main VI's diagram that has the desired ActiveX control attributes displayed and then select Edit>>Create SubVI from the menu. The automation refnum in the subVI will be linked to the ActiveX control and will work the way you want it to. Copy this to your other subVIs and the property nodes will start behaving. The other way to link the automation refnums is to right-click on them and choose select ActiveX class and then browse to your control.
-Jim

How do I stop quicktime from playing mpg in firefox?

I want quicktime to NOT play mpg files in firefox. How can I add a mpg file to the applications section of FF to setup this properly?

QuickTime can be very persistent in wanting to handle (take over) MIME types.
Did you check the file type and MIME setting in the QuickTime Preferences?
*http://kb.mozillazine.org/QuickTime

Alternative for the ActiveX object for the other browsers excluding IE?

I need open a word document (Doc/Docx) then edit and save in client side itsetf.forthat i'm using ActiveXObject and javascript.it is working fine with IE but it's not working in other browsers(Chrome,Firefox).
var w = new ActiveXObject('Word.Application');
w.Visible = true; //set to false to stop the Word document from opening
obj = w.Documents.Open("D:\\test.docx");
docText = obj.Content;
w.Selection.TypeText("Hello world!");
w.Documents.Save();
what is Alternative for the ActiveX object (OR) How can i edit a word document (Doc/Docx) by using client side scripting?
Punch bala

This problem is haaping to you there is reasons are
1. Old FF , so 1st update your browser
2.or net speed , beczzz gmail needs high speed .. high means not like 3G ..it should be approximately 25-30kbps . As u wrote this doesn't happen in IE , becz IE is mad for work in low speed also bt it takes time to load .. ones load never refresh without you permition bt FF works fastly so it try to open as it has dwnloded ,, bt half part cant be stable long .so it refreshes..........
So now update ur browser n use high n stable INTERNET ....

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