description	Learn more about: vararg
title	vararg (C++ COM Attribute)
ms.date	10/02/2018
f1_keywords	vc-attr.vararg
helpviewer_keywords	vararg attribute
ms.assetid	20fc3244-18e9-411c-990e-d5b4fa29a570

vararg

Specifies that the function takes a variable number of arguments.

Syntax

[vararg]

Remarks

The vararg C++ attribute has the same functionality as the vararg MIDL attribute.

Example

The following code shows a use of vararg:

// cpp_attr_ref_vararg.cpp
// compile with: /LD
#include "unknwn.h"
#include "oaidl.h"
[module(name="MyLibrary")];

[object, uuid("00000000-0000-0000-0000-000000000001")]
__interface X : public IUnknown
{
   [vararg] HRESULT Button([in, satype(VARIANT)]SAFEARRAY *psa);
};

Requirements

Attribute context	Value
Applies to	Interface method
Repeatable	No
Required attributes	None
Invalid attributes	None

For more information about the attribute contexts, see Attribute Contexts.

See also

IDL Attributes
Method Attributes