Hi,

we need to deploy Microsoft.mshtml and tried as follows:

* install the assembly into the gac (installshield)
* registering the assembly (installshield - COM interop)

This works for users who executed the install-program for our software. All
other users (including admins) get an "invalid cast"-exception when executing
the following command:

mshtml.HTMLDocument doc =  (mshtml.HTMLDocumentClass)_AxWebBrowser.Document;

It seems as if the registration-step wasn't executed completely?!

Is it possible to detect, whether the install/registration-process for
Microsoft.mshtml was successful? It's shown in the assembly cache list; The
registry entries (which can also be generated with regasm /regfile) are
present, too.

Could this be a security-problem? (Only the registry-entry-owner can access
or something like that)

Is there any standard-path to install the Microsoft.mshtml.dll - file to?
(Like a common shared folder; Or should we store it in our app-folder?)

Thanks in advance,

Stefan