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

# CoTreatAsClass(3w)

## NAME

**CoTreatAsClass** (OLE32.@)

## SYNOPSIS

HRESULT CoTreatAsClass\
  (\
   REFCLSID *clsidOld*,\
   REFCLSID *clsidNew*\
  )

## DESCRIPTION

Sets the TreatAs value of a class.

## PARAMS

*clsidOld* **\[In\]**  Class to set TreatAs value on.

*clsidNew* **\[In\]**  The class the *clsidOld* should be treated as.

## RETURNS

**Success:** **S\_OK**.

**Failure:** **HRESULT** code.

## SEE ALSO

CoGetTreatAsClass

## IMPLEMENTATION

Declared in **"objbase.h"**.

Implemented in **"dlls/ole32/compobj.c"**.

Debug channel **"ole"**.