Working on JScript/VBScript support for MSI

Robert Shearman rob at
Tue Feb 20 15:44:50 CST 2007

Misha Koshelev wrote:
> Hi, since MSDN states that any installer that requires JScript/VBScript
> must make sure to install it, and since some applications require these
> for install (bug #7353 and another one is there for VBScript for a
> different installer), I figure there is no reason why builtin MSI cannot
> use Microsoft Script if it is there (and plus when we have our own
> JScript/VBScript we will be able to use it off the bat with MSI). 
> I have posted my initial work on this on the bugzilla for bug #7353. The
> first file (a patch, will attach also) is my patch which updates
> custom.c to have the appropriate handlers for the custom action types,
> extracts the script from the appropriate place, writes it to a file, and
> uses a framework very similar to the current thread framework for DLLs
> to call my helper call_script function. This first patch, in theory,
> should not have to change much (if at all), although I have not
> thoroughly tested it yet so it probably will. 
> The second file (and attached here too) is dlls/msi/script.c, which is
> where the meat and potatoes of the actual call_script function is/will
> be. Right now it is pretty barebones, but it does load the script from
> the file and calls it appropriately.
> Now I am working on implementing the Session object, although it looks
> like a wrapper around MSI functions we already have so I think it should
> be doable.
> Anyways, any comments on my work so far will be appreciated.

Nice work! Does MSI expose any builtin objects to the scripts (a quick 
Google search indicates there should be a Session object exposed)?

Rob Shearman

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