Re: Extending the Registry donated-code #2

Hi Morten,

No problem, I will add javadoc comments and also extend RegistryConstants so
various value types can be written (REG_SZ etc...) I will try to make this a more
generic method. Also I can't get the enum calls to work, so I'll try to fix them.

Cheers / Christophe

> -----Original Message-----
> From: Discussion of Java/Win32/COM integration with Jawin
> [mailto:[email protected]]On Behalf Of Morten Andersen
> Sent: vrijdag 1 juli 2005 3:47
> To: [email protected]
> Subject: Re: [JAWIN] Extending the Registry donated-code #2
>
>
> Hi Christophe,
>
> I placed a few comments below, but first thanks for taking the time to
> delve into the source. The FuncPtr marshalling string for
> DLL-entry-point invocations is unfortunately still
> work/documentation in
> progress :-).
>
> Christophe Bouhier (MC/ECM) wrote:
> > Hello again,
> >
> > I figured out the short-cut methods won't do the job. I
> have to call the generic
> > invoke method. The serialization is very challenging, I
> managed to do what I want,
> > without being to sure of what I am doing :) I would
> appreciate if someone can check if the
> > instruction string is correct and how to process a return value??
> >
> > here is the code.
> >
> > fpSKV = new FuncPtr("ADVAPI32.DLL", "RegSetValueExW");
> >
> > public static void SetKeyValue(int key, String name, String
> value) throws IOException, COMException {
> >
> >         NakedByteStream nbs = new NakedByteStream();
> >         // wrap it in a LittleEndianOutputStream
> >         LittleEndianOutputStream leos = new
> LittleEndianOutputStream(nbs);
> >         // and then write the Java arguments
> >         leos.writeInt(key); // 4 bytes.
> >         leos.writeStringUnicode(name); // 4 bytes, this is PTR
> >         leos.writeInt(0); // 4 bytes
> >         leos.writeInt(1); // type like REG_NONE = 0, REG_SZ
> =1, REG_EXPAND_SZ=2 etc..
> >         leos.writeStringUnicode(value);
> >         leos.writeInt((value.length()*2));
> > //      System.out.print("Stream length=" + nbs.size() );
> >         fpSKV.invoke("IGIIGI:T1:", 24, nbs, null,
> ReturnFlags.CHECK_NONE);
> >
> >         // T1 throws exception with The operation completed
> successfully.
> >         // T7 is no exception
>
> I assume that the Tx-out-instruction strings are obsolete by know
> (unfortunately I think the *exact knowledge* of this is lost in the
> Jawin history, when Stuart left the project). So I would
> suggest instead
> an instruction string like:
>         "IGIIGI::"
> and a returnflags value:
>         ReturnFlags.CHECK_W32
>
> Please try that with a couple of calls that should
>         1) Succeed, and verify that it actually succeds.
>         2) Fail (eg. by writing to key protected by ACL, or
> to a non-existing
> key), and verify that it actually throws an exception.
>
> Unfortunately I am not sitting at a Windows platform pt., so
> I am unable
> to test this for myself.
>
> > }
> >
> >
> > Can I get CVS access to commit the Registry stub?
>
> I can commit it for you, as soon as you declare it ready for
> commit'ing.
> It would be great if you would add a couple of lines javadoc for the
> method, eg. with a link to the MSDN API description:
> http://msdn.microsoft.com/library/default.asp?url=/library/en-
us/sysinfo/base/regsetvalueex.asp
and a short note on the implementation ONLY supporting writing of REG_SZ
values.

If you choose to supply a diff-file, feel free to mail it to me
off-list, as I don't think the maillist forwards any attachments.

Best Regards
Morten