Re: Invoking Application based on UID.

Hi,

I am not surprise you don't get it, as I don't understand myself what I am doing ;-)

The objective is to get the default web browser from the registry and launch it.
My thinking is that I should look at file extensions like .htt .htm or html

I have no specific reason to use the PersistentHandler. It looked like
a CLSid in the registry so I tried to invoke it, but I am sure I am on the wrong path here.

I now figured out that the [.extension] actually contains the progid , which I can invoke
and works. I tried it out for .doc returning "Word.Document.8" which I can access.
For the .htm I get progid "htmlfile", I tried to create a Dispatch point on this, but
it doesn't launch internet explorer.

Am I getting closer?
Cheers / Christophe



-----Original Message-----
From: Discussion of Java/Win32/COM integration with Jawin
[mailto:[email protected]]
Sent: Wednesday, March 09, 2005 1:08 PM
To: [email protected]
Subject: Re: [JAWIN] Invoking Application based on UID.


I don't get it. Why do you want the PersistentHandler for a the file? Are
you writing your own version of the indexing service?

What exactly are you trying to accomplish? Maybe I can give better answers
with a higher level description of the problem.

The most likely reason for your exception is that the Ifilter interface that
GUID represents isn't a descendant of IDispatch.  It's a custom interface.

    ++PLS

-----Original Message-----
From: Discussion of Java/Win32/COM integration with Jawin
[mailto:[email protected]] On Behalf Of Christophe Bouhier (MC/ECM)
Sent: Tuesday, March 08, 2005 9:24 PM
To: [email protected]
Subject: Re: [JAWIN] Invoking Application based on UID.

Hi,

Objective: Detect the default browser and open it with some URL.
Approach: Read all I can grab and try stuff out..
Efficiency: Not very good, trial and error...Struggling to understand COM,
back to the basics...

I tried something else with more success. (This code works).
        try {
            Ole32.CoInitialize();
                GUID guid = new
GUID("{91493441-5A91-11CF-8700-00AA0060263B}");
            DispatchPtr powerpoint = new DispatchPtr(guid);
              powerpoint.put("Visible", true);
            Ole32.CoUninitialize();

        } catch (COMException e) {
            e.printStackTrace();
            System.out.println(e.getMessage());
        }

So OK, I can use the Clsid instead of the ProgID to access COM, but the
thing is I don't know the CLsid, so I look it up in the registry.

HKEY_LOCAL_MACHINE\SOFTWARE\\Classes\\.htt\\PersistentHandler

PersistentHandler key return an ID which returns the message:

- 80040154: Class not registered

So I guess I am trying to invoke on a non-valid Clsid.
I am really confused on how the PersistenHandler key relates to the valid
application CLsid...

It would be great if someone can enlight me here....


Cheers / Christophe




-----Original Message-----
From: Discussion of Java/Win32/COM integration with Jawin
[mailto:[email protected]]
Sent: Wednesday, March 09, 2005 12:01 PM
To: [email protected]
Subject: Re: [JAWIN] Invoking Application based on UID.


I may be a Java newbie, but I know COM.

Doesn't COMException contain the HRESULT of the failing operation?
What is it?

    ++PLS

-----Original Message-----
From: Discussion of Java/Win32/COM integration with Jawin
[mailto:[email protected]] On Behalf Of Christophe Bouhier (MC/ECM)
Sent: Tuesday, March 08, 2005 8:11 PM
To: [email protected]
Subject: [JAWIN] Invoking Application based on UID.

Hi,

I have been using jawin succesfully in my application, accessing COM through
the Dispatch interface. This easy to do, minding a well documented API (Like
iTunes).

Now I try to access COM through the GUID of an application, as retrieved
from the registry.
I have the feeling that I am close to the solution, but I think I am
overlooking something.

Specifically I query the Registry to retrieve a file extension's
'PersistentHandler'.
Here is the code below. I can create the extend Dispatch class named
"ipBrowser" but invoking a method on it throws a COMexception.

Can someone tell me what I am doing wrong?

        ///// GET A KEY METHOD

        public static String getStringValue(int area, String keyString,
String valueString) {
        int key;
        try {
                key = Registry.OpenKey(area,
                    keyString);
            String value = Registry.QueryStringValue(key, valueString);
            Registry.CloseKey(key);
            return value;
                return value;
        } catch (IOException e) {
            e.printStackTrace();
        } catch (COMException e) {
            e.printStackTrace();
        }


        ////////////////////////////////////////
        //  CREATE A
        ///////////////////////////////////////

        String id = ipRegistry.getStringValue(
                RegistryConstants.HKEY_LOCAL_MACHINE,
                "SOFTWARE\\Classes\\.htt\\PersistentHandler", "");
        try {
            Ole32.CoInitialize();
            ipBrowser browser = new ipBrowser(id);
                browser.invoke("Open","www.yahoo.com"); <<<-----------COM
EXCEPTION.
            Ole32.CoUninitialize();

        } catch (COMException e) {
            e.printStackTrace();
        }

        ///////////////////////////////////////////
        // EXTEND DISPATH TO register the GUID
        //////////////////////////////////////////
        public class ipBrowser extends DispatchPtr {

        public GUID DIID;

        public int iidToken;

        public ipBrowser(String guid) {
            DIID = new GUID(guid);
            iidToken = IdentityManager.registerProxy(DIID,
                    ipLaunchBrowser.class);
        }

        /**
         * @see org.jawin.IUnknown#getIIDToken()
         */
        public int getIIDToken() {
            return iidToken;
        }

    }

Thank / Christophe