TN WW195 How to Register a Windows dll file with the OS and check to see if it loaded.

Description

This article from InSource shows how to see if a Wonderware or third party dll is properly registered with the operating system.

• Author: Rufus Handsome
• Published: 10/20/2017
• Applies to: Wonderware software components And Microsoft Windows based operating systems

Details

First you may want to copy the dll to the C:\Windows\System32 or C:\Windows\SysWOW64 directory

Then run the "regsvr32 /i <dll_name>" to manually register the dll with the operating system.

Below are the command line based registry queries and the MSInfo32 tool to see if the dll is registered with the OS .

1. You can go to Start -> Run -> and type in MSInfo32 and look under "Software Environment", "Loaded Modules", this is a listing of all the dll's currently loaded in the system.
2. REG QUERY HKEY_CLASSES_ROOT\AppID\<dllname>
    
3. REG QUERY HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\<dllname>
    
4. reg query HKLM\SOFTWARE\Classes /s /f <dllname>