Re: [Bug-gnubg] Bug when opening from file icon a match saved in .sgf

[Jon Kinsey]

At 20:05 12/10/2003, Joern Thyssen wrote:
> On Sun, Oct 12, 2003 at 08:22:37PM +0200, Nardy Pillards wrote
> > On 12 Oct 2003 at 16:58, Joern Thyssen wrote:
> >
> >
> > > Isn't there some environment variable we can query or some function we
> > > can call that'll return the path to "program files"? Or will this only
> > > work if installed in the default suggested directory? Is it somehow
> > > possible to find out where gnubg was installed?
> > >
> > > If possible, it should be trivial to initialise the data directory
> > > with this value.
> >
> > You can read the Registry.
> > (Installation Archive keeps the Installation Directory there)
> >
> > But you can also set (and read) an environment variable.
> > DOS command:
> > SET xyz=[value]
> >
> > I would opt for the second choice, although the WinPro(g)s will say:
> > No way. Use that Registry!!
>
> I'd opt for the registry, unless it's possible by the installer to add
> the environment variable to the list of system env. variables.
>
> It shouldn't be that difficult to query the registry (or am I just being
> naïve)?

Here's some sample code to read the value from the registry (I think this 
works with 95):

Jon

#include <windows.h>
#include <stdlib.h>

int main()
{
        char buf[_MAX_PATH];
        DWORD buflen = _MAX_PATH;
        HKEY key;
        LONG res = RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\gnubg",
                0, KEY_READ, &key);
        if (res == ERROR_SUCCESS)
        {
                res = RegQueryValueEx(key, "Install_dir", 0, 0, 
(LPBYTE)buf, &buflen);
                if (res == ERROR_SUCCESS)
                {
                        printf("test: %s\n", buf);
                }

                RegCloseKey(key);
        }
        return 0;
}