How to check if a certain DLL is registered? Need RegSvr32 WITHOUT action

[gajrap]

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Hey guys, I have some questions I need to know about. I know how to register or un-register any specific DLL with the well-known RegSvr32 command. That’s fine. But I wanted to know how can I check after register or un-register if a certain DLL is already registered or not without any action? For example if I have two DLL file with the same name for example: D:\myproj\aaa.dll and D:\myproj\stable\aaa.dll. Here how can I come to know that how can I come to know if aaa.dll IS registered. Please help.

[supremer]

First you need to know the name of the object you are looking for (you might have to search the registry for this). Using "C:\WINDOWS\System32\wshom.ocx" as an example (same thing for OCX/DLL) then you would search the registry under HKEY_CLASSES_ROOT and find out that "WScript.Network" is the name to look for.

Your script would read the CLSID (a.k.a. GUID a.k.a globally unique identifier)
from this key: HKEY_CLASSES_ROOT\WScript.Network\CLSID

- Then use the CLSID to find the actual code here:
HKEY_CLASSES_ROOT\CLSID\{093FF999-1EA0-4079-9525-9614C3504B74}

- The file path is stored here:
HKEY_CLASSES_ROOT\CLSID\{093FF999-1EA0-4079-9525-9614C3504B74}\InProcServerÂ*32

Keep in mind there can be different versions referenced (ie: WScript.Network.1, WScript.Network.2), but the current version should be listed without a number at the end (WScript.Network)

[Casher]

Hellogajrap, you just have to search teh following keys for the DLL file's name:

[HKEY_CLASSES_ROOT\CLSID]

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\SharedDLLs]


Hope it helps.