A version collection is a collection of object versions. There are several different version collections you can establish:
The set of all versions of an object. (See the Versions-of-Object collection.)
The predecessors of an object version. (See the Predecessor-Versions collection.)
The successors of an object version. (See the Successor-Versions collection.)
The set of versions of a particular target object that are related to a particular source object version. (See the Target-Versions collection.)
The set of object versions present in a workspace. (See the Versions-of-Workspace collection.)
The set of workspaces in which a particular item is present. (See the Workspaces-of-Version collection.)
The set of object versions checked out to a workspace. (See the Checkouts-of-Workspace collection.)
When to Use
Use the IVersionCol interface to manage the contents of a workspace, to manage the target object versions of a versioned relationship, to navigate an object’s version graph, or to manipulate all the versions of a particular object.
Methods
IUnknown Method
Description
QueryInterface
Returns pointers to supported interfaces.
AddRef
Increments the reference count.
Release
Decrements the reference count.
IDispatch Method
Description
GetIDsOfNames
Maps a single member and a set of argument names to a corresponding set of dispatch identifiers.
GetTypeInfo
Retrieves a type information object, which can be used to get the type information for an interface.
GetTypeInfoCount
Retrieves the number of type information interfaces that an object provides (either 0 or 1).
Invoke
Provides access to properties and methods exposed by an Automation object.
IVersionCol Method
Description
Add
Adds an object version to the collection.
get_Count
Returns the number of items in the collection.
get_Item
Returns an interface pointer to an item of the collection.
_NewEnum
Retrieves an enumeration interface pointer for the collection.