description	Learn more about: in (C++)
title	in (C++ COM Attribute)
ms.date	10/02/2018
f1_keywords	vc-attr.in
helpviewer_keywords	in attribute
ms.assetid	7b450cc4-4d2e-4910-a195-7487c6b7c373

in (C++)

Indicates that a parameter is to be passed from the calling procedure to the called procedure.

Syntax

[in]

Remarks

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

Example

See bindable for an example of how to use in.

Requirements

Attribute context	Value
Applies to	Interface parameter, interface method
Repeatable	No
Required attributes	None
Invalid attributes	retval

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

See also

IDL Attributes
Parameter Attributes
Method Attributes
defaultvalue
id
out