DLL files: General Information and Troubleshooting:

A dynamic-link library (DLL) file is an executable file that allows programs to share code and other resources necessary to perform particular tasks. Microsoft Windows provides DLL files that contain functions and resources that allow Windows-based programs to operate in the Windows environment.

Microsoft DLL Help database
This database contains information about DLL files that ship with selected Microsoft products. DLL Help exists to assist developers, system administrators, and other IT professionals who face file version conflicts with Microsoft software. Use DLL Help to identify which software installed a specific version of a DLL.

Support WebCast: Overcoming DLL Hell March 23, 2000 This session will explain how you can use the DLL Universal Problem Solver tool (also called the DUPS tool) to find and fix issues that occur when your DLL file versions conflict. These are also known as “DLL Hell” problems. The DUPS package is a set of utilities that you can use to track and compare DLL versions on multiple Windows-based computers

Explanation of Regsvr32 Usage and Error Messages
You can use the Regsvr32 tool (Regsvr32.exe) to register and unregister object linking and embedding (OLE) controls such as dynamic-link library (DLL) or ActiveX Controls (OCX) files that are self-registerable. This may be necessary to troubleshoot some issues with Windows, Microsoft Internet Explorer, or other programs.
More information

Related articles:

Troubleshooting Kernel32.dll errors and Invalid Page Faults

What Are Windows Fatal Exception Errors

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