---
description: "Learn more about: property (C++)"
title: "property (C++)"
ms.date: "11/04/2016"
f1_keywords: ["property_cpp"]
helpviewer_keywords: ["property __declspec keyword", "__declspec keyword [C++], property"]
ms.assetid: f3b850ba-bf48-4df7-a1d6-8259d97309ce
---
# property (C++)

**Microsoft Specific**

This attribute can be applied to non-static "virtual data members" in a class or structure definition. The compiler treats these "virtual data members" as data members by changing their references into function calls.

## Syntax

```
   __declspec( property( get=get_func_name ) ) declarator
   __declspec( property( put=put_func_name ) ) declarator
   __declspec( property( get=get_func_name, put=put_func_name ) ) declarator
```

## Remarks

When the compiler sees a data member declared with this attribute on the right of a member-selection operator ("**.**" or "**->**"), it converts the operation to a `get` or `put` function, depending on whether such an expression is an l-value or an r-value. In more complicated contexts, such as "`+=`", a rewrite is performed by doing both `get` and `put`.

This attribute can also be used in the declaration of an empty array in a class or structure definition. For example:

```cpp
__declspec(property(get=GetX, put=PutX)) int x[];
```

The above statement indicates that `x[]` can be used with one or more array indices. In this case, `i=p->x[a][b]` will be turned into `i=p->GetX(a, b)`, and `p->x[a][b] = i` will be turned into `p->PutX(a, b, i);`

**END Microsoft Specific**

## Example

```cpp
// declspec_property.cpp
struct S {
   int i;
   void putprop(int j) {
      i = j;
   }

   int getprop() {
      return i;
   }

   __declspec(property(get = getprop, put = putprop)) int the_prop;
};

int main() {
   S s;
   s.the_prop = 5;
   return s.the_prop;
}
```

## See also

[__declspec](../cpp/declspec.md)<br/>
[Keywords](../cpp/keywords-cpp.md)