Solve Comcat.dll Error Messages

The DLL comcat.dll is the library module for the Microsoft Component Category Manager in Microsoft Windows NT and Microsoft Windows Vista. It is used to facilitate handling of component categories and ensure the consistency of the registry.

The comcat.dll file provides methods to obtain information about categories registered in the system. It is able to display a subset of all of the installed components, which are identified by GUID (Globally Unique Identifier). At the same time, the comcat.dll is used to register and unregistered component category information in the system registry.

Human-readable names of categories as well categories implemented by a given component or class can be included or deleted in the registry using the comcat.dll file.

A component ID (CATID) assigned by the programmer through the comcat.dll file is associated with names that are locale-tagged and are readable to users. Only the author of the component category definition can create the CATID and publish this along with the definition. The comcat.dll stores a list of the CATIDs and the human-readable names in the registry.

Given that a single component could support a wide range of functionality, one component can belong to different component categories. Because the comcat.dll file has the ability to sort the components through the CATIDs, it organizes and manages the component categories in an efficient and user-friendly way.

Aside from providing the module in managing component categories, the comcat.dll file also functions as a necessary file to register .DLL and .OCX files during installation of ActiveX in Windows NT. The comcat.dll is treated as a Microsoft “redistributable” library essential in the operation of ActiveX controls. Applications where ActiveX is necessary should have correct version of the comcat.dll upon installation.

For example installations of the Panorama Factory needs matching versions of the comcat.dll file because its color wheel is an Active X control. Similarly installation of the program SupportAide will be interrupted if the comcat.dll file in Windows does not match with the ole32.dll file in the application.

Comcat.dll is created by:
Microsoft Corporation
Microsoft Support Site

Known file path:
C:\ Windows\ System32\ comcat.dll

What is a DLL?

Your operating system comes pre-installed with Microsoft DLL’s and most third party programs also install DLL’s.

DLL (Dynamic Link Library) is Microsoft’s implementation of the shared library concept. Meaning there’s a DLL library on your computer and each DLL can be shared among different Microsoft and third party programs. This shared library method helps your computer run faster by having fewer operations running at the same time.

When a DLL is missing or corrupt it may show an error message and programs may fail or crash.

Because DLL’s are shared, one missing or corrupt DLL may affect multiple programs on your computer.


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