The AutoCAD registry is composed of three main sections. The HKEY_CLASS_ROOT

section contains all the information for the ActiveX automation, as well as file

descriptor. This section does not need in any case and at any time to be

modified by a third party application. This section is and must stay

instanciated by the AutoCAD installer. However, in Mechanical Desktop and

AutoCAD r14.01, there is a bug in the installer which can cause problem for the

Automation part. This bug (and solution will be described later in that

document).

For the two other sections, we have to be careful on which system and

configuration the user is working on. Windows 95/98 differ from Windows NT in

term of permission per user, to allow access to the registry at a given user.

But in short, the HKEY_LOCAL_MACHINE section contains all the default

information AutoCAD needs to initialized itself for a new NT login user, as well

it contains the ARX applications demand loading information.

On another hand, the HKEY_CURRENT_USER contains the default settings and

profiles for a given NT login user. (note that Windows 95/98 has only one common

login user).

- HKEY_CLASS_ROOT.

As said before, you should not manipulate or modify that section yourself.

Except for fixing the AutoCAD r14.01 installer bug, in case it occurs on your

computer. Most of the time that bug does not show, or is not showing up on a

target computer, because the AutoCAD ActiveX server is not used. But to fix the

problem, you just need to apply the following .REG file on the computer, or to

integrate the needed changes in your installer.

>>>>>>>>>>>>>

REGEDIT

HKEY_CLASSES_ROOT\Interface\{372FA490-600C-11CF-93EB-0800099EB3B7} =

IAcadApplication

HKEY_CLASSES_ROOT\Interface\{372FA490-600C-11CF-93EB-0800099EB3B7}\TypeLib =

{9B5492B0-EC9A-11CE-935A-0800099EB3B7}

HKEY_CLASSES_ROOT\Interface\{9B5492B1-EC9A-11CE-935A-0800099EB3B7} =

IAcadDocument

HKEY_CLASSES_ROOT\Interface\{9B5492B1-EC9A-11CE-935A-0800099EB3B7}\TypeLib =

{9B5492B0-EC9A-11CE-935A-0800099EB3B7}

HKEY_CLASSES_ROOT\Interface\{24B8A4E0-432A-11D0-A893-0800091B9B14} =