Re: Automatically locate Netscape's GRE installation directory.

[Doug Turner]

Motti wrote:

My problem is that I don't know how to determine which directory is
the correct one. There's only one GRE installed on my computer
(Netscape's) but my understanding is that users might have several.
Your application must pick the one to use. 
Netscape shipped an official Mozilla GRE (as 
indicated by where it was installed.)

Basically what I'm asking is there an elegant way to find which GRE
netscape was installed with? If not can I build the directory from the
data in mainifest.ini?
Elegant... not sure.  but you can use the windows 
registry.  Attached is some code that will 
enumerate all of the GRE's installed.

Also, is the 'f' between the ProductID and the BuildID constant or
could it be something else?
f == final.  It is basically the released version 
of the GRE.

Hope this helps,

Doug Turner


static const char* kRegLocation = "Software\\mozilla.org\\GRE\\";
HKEY hRegKey = NULL;
DWORD loop = 0;
char    greVersionKey[256];
DWORD   greVersionKeyLen =256;

if (::RegOpenKeyEx(HKEY_LOCAL_MACHINE, 
                                   kRegLocation, 
                                   0, 
                                   KEY_READ, 
                                   &hRegKey) == ERROR_SUCCESS) 
{
while(RegEnumKeyEx(hRegKey, 
          loop++, 
          greVersionKey, 
          &greVersionKeyLen, 
          NULL, NULL, 
          NULL, NULL) != ERROR_NO_MORE_ITEMS)
{

        // do something interesting...

        greVersionKeyLen = 256;
}

::RegCloseKey(hRegKey);
}