vi_progid

Specifies a version-independent form of the ProgID.

[ vi_progid( 
   name 
) ];

Parameters

  • name
    The version-independent ProgID representing the object.

    ProgIDs present a human-readable version of the class identifier (CLSID) used to identify COM/ActiveX objects.

Remarks

The vi_progid C++ attribute lets you specify a version-independent ProgID for a COM object. A ProgID has the form name1.name2.version. A version-independent ProgID does not have a version. It is possible to specify both the progid and the vi_progid attributes on a coclass. If you do not specify vi_progid, the version-independent ProgID is the value specified by the progid attribute.

vi_progid implies the coclass attribute, that is, if you specify vi_progid, it is the same thing as specifying the coclass and vi_progid attributes.

The vi_progid attribute causes a class to be automatically registered under the specified name. The generated .idl file will not display the ProgID value.

In ATL projects, If the coclass attribute is also present, the specified ProgID is used by the GetVersionIndependentProgID function (inserted by the coclass attribute).

Example

See the coclass example for a sample use of vi_progid.

Requirements

Attribute Context

Applies to

class, struct

Repeatable

No

Required attributes

None

Invalid attributes

None

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

See Also

Reference

ProgID Key

Other Resources

IDL Attributes

Typedef, Enum, Union, and Struct Attributes

Class Attributes

Attributes Samples