---
name: "RegOpenUserClassesRoot"
section: "3w"
platform: "linux"
package: "libwine-dev"
version: "1.4.1-4"
release: "Debian 7 (Wheezy)"
platforms: ["linux"]
url: "https://new.carta.tech/RegOpenUserClassesRoot"
---

# RegOpenUserClassesRoot(3w)

## NAME

**RegOpenUserClassesRoot** (ADVAPI32.@)

## SYNOPSIS

LSTATUS RegOpenUserClassesRoot\
  (\
   HANDLE *hToken*,\
   DWORD  *dwOptions*,\
   REGSAM *samDesired*,\
   PHKEY  *phkResult*\
  )

## DESCRIPTION

Open the **HKEY\_CLASSES\_ROOT** key for a user.

## PARAMS

*hToken* **\[In\]**  Handle of token representing the user.

*dwOptions* **\[In\]**  Reserved, must be **0.**

*samDesired* **\[In\]**  Desired access rights.

*phkResult* **\[Out\]**  Destination for the resulting key handle.

## RETURNS

**Success:** **ERROR\_SUCCESS**

**Failure:** nonzero error code from Winerror.h.

## NOTES

On Windows(tm) **2000** and upwards the **HKEY\_CLASSES\_ROOT** key is a view of the **"HKEY\_LOCAL\_MACHINEftware**

## IMPLEMENTATION

**Declared in "winreg.h"**.

Implemented in **"dlls/advapi32/registry.c"**.

Debug channel **"reg"**.