On Jul 20 11:51, Chris Sutcliffe wrote:
> On 20 July 2010 10:32, Corinna Vinschen wrote:
> > Can you please explain this a bit more? What exactly are these
> > applications doing? I'm asking because one way to extract the constants
> > via an application is "grep" in the VC++ include directory. How are the
> > apps in question extracting constants?
>
> One example is the following code employed by a user to determine the
> value IID_IActiveDesktop:
>
> #include <windows.h>
> #include <shlguid.h>
> #include <stdio.h>
> #include <string.h>
>
> void print_guid(const char *name, const GUID *guid)
> {
> int mem[4]; /* Assume sizeof(int) == 4 */
> int i;
>
> memcpy(mem, guid, sizeof(mem));
>
> printf("%s: 0x", name);
> for (i = 0; i < 4; i++)
> printf("%X", mem[i]);
> printf("\n");
> }
>
> int main(void) {
> GUID template = IID_IShellView2;
> GUID cls = CLSID_ActiveDesktop;
> GUID iid = IID_IActiveDesktop;
>
> print_guid("template", &template);
> print_guid("cls", &cls);
> print_guid("iid", &iid);
>
> return 0;
> }
>
> This code was compiled VC++ and run to extract IID_IActiveDesktop.
> From what the OP stated, he never looked at the header files, just
> used this 'blackbox' approach.
Hmm, that looks... interesting. No worries for the CLSID value which
can easily be extracted from the registry (HKEY_CLASSES_ROOT\CLSID),
but otherwise...
> > FYI, I already asked for legal advice about the situation with Mingw64,
> > which is different, but might give some important insight. kIf you give
> > me some hints about these apps, I'll forward your request as well. The
> > reply might take some time, though.
>
> No worries, I would very much appreciate the legal advice around this
> and will gladly hold off doing anything with the patch until I've
> heard back.
Ok, I'll forward this problem.
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader cygwin AT cygwin DOT com
Red Hat
