What is the Purpose of rundll32.exe and rundll.exe Commands on Windows?

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Discussion Overview

The discussion revolves around the purpose and function of rundll32.exe and rundll.exe commands on Windows, particularly in relation to DLL (Dynamic Linked Library) files. Participants explore the nature of DLL files, their usage, and the implications of manipulating them.

Discussion Character

  • Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant inquires about the purpose of DLL file extensions and their associated commands.
  • Another participant explains that DLL files are not meant to be opened or run directly by users, as they serve as "helper programs" for other applications.
  • A different participant warns against deleting DLL files, noting their role in hardware drivers.
  • Another comment emphasizes that DLLs are modules used in software, advising caution before deletion unless the user understands their function.
  • One participant introduces the commands rundll.exe and rundll32.exe, stating they allow calling functions from DLLs specifically designed for such use.

Areas of Agreement / Disagreement

Participants generally agree on the nature and purpose of DLL files, but there is no consensus on the implications of deleting them or the specific functions of rundll.exe and rundll32.exe.

Contextual Notes

There are limitations regarding the understanding of which specific functions can be called by rundll.exe and rundll32.exe, as well as the potential risks associated with manipulating DLL files.

jill40
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I've been seeing this certain file extension lately on my computer, but I do not know what programs to run them. What are file extension dll?
 
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DLL is most commonly a "Dynamic Linked Library". DLL files are not intended for users to open/run. They contain "helper programs" that are used by other programs.

Here is a helpful source for future reference : http://www.file-extensions.org/dll-file-extension
 
Never delete them...They also are used for hardware drivers on your computer too.
 
Let's just cut through it, they're modules (code) used in software. Don't delete them unless you know exactly what they do (chances are you don't in 99.99% of cases).
 
there is a command under Windows called rundll.exe and rundll32.exe

http://support.microsoft.com/kb/164787

that allow you to call functions from a DLL that are explicitly written to be called by them.
 

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