70884 - FLPLauncher Error Message in VB6

Status: RESOLVED WORKSFORME

(Core Graveyard :: Embedding: ActiveX Wrapper, defect)

Description

[Howard Ryan]

The control is registered properly.  Error reads "Failure sinking events from 
IWebBrowser2".  The ctrl used is marked: Friday, March 02, 2001, 5:49 PM from 
ftp://ftp.mozilla.org/pub/mozilla/nightly/latest/mozilla-win32.zip.
The application builds fine in VB however, the error message persists on app 
launch, NOT on app end.  In VB6 IDE, the message occurs on RUN and on END.

Comment 1

[Keyser Sose]

Reporter I am unclear to as to where your seeing this bug. Have you been able to
reproduce it?

Comment 2

[Howard Ryan]

I get this error when I try and run an app in VB6 which has GECKO.  The error 
reproduces continually hence I have labeled it a BLOCKER.  I have spent endless 
hours making sure the control is properly installed and yet the message 
persists.  I will try to duplicate on another machine.  Any ideas?

Comment 3

[Adam Lock]

The Mozilla control seems to be exposing it's event sinks in a correct fashion 
and in fact CBrowse would complain if it wasn't.

It may be possible that the error message is incorrect or that 
FlpLauncher is trying to subscribe to events by passing in a different IID than 
DIID_DIWebBrowserEvents2.

What is FlpLauncher anyway? If it's a browser helper object, try renaming the 
DLL and see if the problem persists.

Comment 4

[Howard Ryan]

I have absolutely NO idea what FLPLauncher is.  I was assuming this was 
something derived from the Gecko class.  Have you tried the latest ctrl in a VB 
IDE?  When you talk about CBrowse, I start to think maybe we should think about 
VBrowse.  ;-)

Anyway, I guess it would help me if you could verify that ONLY I am having this 
problem in the VB6 IDE (SP4 

As far as this FLPLauncher being a browser helper object, I can only say that I 
made a browser with nothing other then a basic toolbar and browser ctrl and the 
error persists.  

I originally received the error in a more complex browser and decided to make a 
stripped browser to see if the error would stop.  This was not the case so I am 
not sure what if any browser helper object would be responsible for 
this "FLPLauncher".  Therefore I couldnt even begin to imagine what dll's to 
rename.

Comment 5

[Adam Lock]

A browser helper object is an ActiveX control registered in your registry under:

"HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer\Browser 
Helper Objects"

Mozilla will load any that it finds there and it's possible that one of these is 
 the "FLPLauncher" which is complaining. Try renaming this registry key 
and restart the app to see if that solves the problem. Also do a search for any 
files called FLPLauncher to see if that gives a clue as to what it is.

Comment 6

[Adam Lock]

Howard, have you searched to see what this "FlpLauncher" program is? I suspect 
it's a browser helper object as discussed previously and nothing to with either 
the control or VB.

Comment 7

[Howard Ryan]

I removed the helper objects and this resolved the problem.

Great!

Any idea why this may have happened with the helper objects?

Is this perhaps 3rd party components designed around the architecture of IE?

That being said.....I wonder if a properly deployed Mozilla browser would run 
into the same issues on other machines because of helper objects.

Seems like an issue to be duly noted.

Any thoughts on this?

Up the ante a tad more and think aboyr what ramifications if any may arise if 
we made the Mozilla browser the default browser.

I was not able to reproduce the FLPLauncher error ( and lets now assume 
FLPLauncher was some bogus helper object from some 3rd party junk I had on my 
machine ) when I ran Mozillas browser(s).  I wonder why the activeX component 
failed on my machine and yet the same ctrl in the Mozilla browser was able to 
ignore the registry settings regarding helper objects.

I am imagining that IE's lead into the activeX arena may have led other 
companies to create objects that may infact interfere with a gecko browser from 
time to time.

Either that, or I am way off base here. 

Comment 8

[Adam Lock]

Without knowing what the helper object is it's impossible to say why it isn't 
working. As far as I know the event sinks in the Mozilla control are working 
properly. It is possible that it is illegally trying to attach its event sink by 
subscribing to the IID_IDispatch connection point instead of 
DIID_DIWebBrowserEvents2 but I can't know that without the source.

I'm marking this as WORKSFORME but I will consider how to make loading browser 
helpers an optional feature.