Turning off InfoCenter in AutoCAD

Are you looking for a way to turn off the annoying InfoCenter that slows down (or sometimes locks up) your AutoCAD? Of course you are! Hop on over to the ManuSoft Freebies page and install AcadInfoCenterOff.msi, the most popular ManuSoft download of all time.

2017-03-21: Now updated with support for AutoCAD 2018 and AutoCAD LT 2018!

AutoCAD 2015: Managing the Application Manager

AutoCAD 2015 includes a new feature called Application Manager. I’m sure it serves a lofty purpose, but it comes across a lot like the slimy Norton and Adobe updaters that are really just Trojans in disguise. It gets installed by default, with no option to prevent installation. To Autodesk’s credit, they do provide instructions for preventing installation of Application Manager, and instructions for removing it after the fact. Uninstalling requires several additional clicks, as if they really, really want you to think twice before taking such a drastic measure.

I don’t want anything starting when I log into Windows except the bare minimum, so I uninstalled Application Manager forthwith. It can be installed and started manually if I decide to use it later.


If you decide to use Application Manager, there are some configurable settings. There is even a UI for most of the settings (such as disabling the automatic startup), but there’s a catch: to use the UI for changing settings, you first have to agree to the Autodesk Privacy Statement (and give Autodesk access to information about your installed software). I’m sure this is just an oversight, but the paranoid will not find it comforting.

Application Manager settings are stored in a plain text file, located by default at:

“%AppData%AutodeskAutodesk Application Manager.ini”

If you don’t want to agree to Autodesk’s terms, you can still change settings by editing the .ini file in a text editor like Notepad (just enter the file path above in Start -> Run). For example, change the line to AutoRun=false if you want to disable “Automatically start when you log into the computer”. Note that this setting is somewhat misleading: Application Manager always starts regardless, but it quickly exits again if AutoRun is set to false. If you already agreed to the privacy policy, but have since changed your mind, you can set PrivacyPolicyLevel=0.

Registering an ARX/BRX module as a COM server

If you’re developing ARX modules that need to be registered as a COM server, you’re faced with some decisions about how to register them. In the old days before anyone cared about user permissions, registration could be safely accomplished at runtime, even via AutoLISP. Unfortunately runtime COM server registration just doesn’t work reliably any more under limited user accounts, not to mention registry redirection on 64-bit platforms. There is only one reliable way to register COM servers, and that’s doing it at install time under elevated privileges.

A normal Windows application might accomplish install-time registration by calling RegSvr32 after the files are copied to the destination folder, but this doesn’t work with ObjectARX or BRX modules. The reason it doesn’t work is because ARX modules cannot be loaded outside the AutoCAD or Bricscad process. RegSvr32 will fail with errors like “The module <filename> failed to load” or the even less helpful “The specified module could not be found.” There are some kludgy ways to get RegSvr32 to work anyway, but the simplest and most reliable way to solve this problem is to forget RegSvr32 and just add the needed registry values manually into your installer script. It’s not difficult, though it might be time consuming initially if your server implements a lot of COM objects.

At a minimum, a COM server must register at least one COM class under HKCRCLSID. If the COM server needs to support OLE Automation (e.g. VBA, AutoLISP) it must register a type library in HKCRTypeLib. In most cases, this is all that is needed, however you may also need to register a “ProgID” in HKCR if a script or in-process module needs to be able to connect to the server via human-readable ProgID.

Most installation script software can import Windows registry script (.reg) files, so it’s often helpful (and more maintainable) to create a registry script file manually, then simply import the .reg file into the installation script. If you use Visual Studio deployment projects, this is the only way to batch import registry values into the installation script. I’ve provided a minimal template for a registry script that registers a single COM object and ProgID. The template uses special characters as placeholders for the actual values: $$ is the human readable ProgID name, ## is the COM object’s CLSID, ** is the filename of your ARX module, and %% is the type library GUID. The type library and object class version numbers should match your actual version numbers as well, and of course [TARGETDIR] is the installation target directory that will be resolved at install time.

Windows Registry Editor Version 5.00

@=”$$ Class”


@=”$$ Class”







@=”$$ 1.0 Type Library”





It’s really not that complicated for a single module. The work can be tedious to create all the values for multiple modules in scenarios where you support multiple AutoCAD and/or Bricscad versions or platforms, but these values typically don’t change over the life of the project, so it only needs to be done once. Once you have created the registry values manually, disable all other forms of COM server registration such as wizard-generated runtime registration or automatic “self-registration” at install time. A bonus side effect of the manual registration approach is that a normal uninstall reliably removes all traces of the COM server registration.