rundll32

• Gjelder for:

  ✅ Windows Server 2025, ✅ Windows Server 2022, ✅ Windows Server 2019, ✅ Windows Server 2016, ✅ Windows 11, ✅ Windows 10, ✅ Azure Local, versions 23H2 and 22H2

Loads and runs 32-bit dynamic-link libraries (DLLs). There are no configurable settings for Rundll32. Help information is provided for a specific DLL you run with the rundll32 command.

You must run the rundll32 command from an elevated command prompt. To open an elevated command prompt, click Start, right-click Command Prompt, and then click Run as administrator.

Syntax

rundll32 <DLLname>

Parameters

Parameter	Description
Rundll32 printui.dll,PrintUIEntry	Displays the printer user interface.

Remarks

Rundll32 can only call functions from a DLL explicitly written to be called by Rundll32.

Related links

• Command-Line Syntax Key