TAggregate Members

The following tables list the members exposed by TAggregate.

	Name	Description
	Activate	This is Activate, a member of class TAggregate.
	AssignTo	Copies the properties of an object to a destination object.
	Changed	Updates the collection to reflect changes to the collection item.
	DefineProperties	Provides an interface for a method that reads and writes otherwise unpublished data.
	GetOwner	Returns the collection to which this item belongs.
	GetOwner	Returns the owner of an object.
	SetCollection	Sets the value of the Collection property.
	SetDisplayName	Sets the name of the collection item as it appears in the collection editor.
	SetIndex	Moves the collection item to a specified position in the parent collection.

Protected Properties

	Name	Description
	DependentFields	This is DependentFields, a member of class TAggregate.
	RecBufOfs	This is RecBufOfs, a member of class TAggregate.

Public Methods

	Name	Description
	AfterConstruction	Responds after the last constructor has executed.
	Assign	Copies the properties of another TAggregate object.
	BeforeDestruction	Responds before the first destructor executes.
	ClassInfo	Returns a pointer to the runtime type information (RTTI) table for the object type.
	ClassName	Returns a string indicating the type of the object instance (as opposed to the type of the variable passed as an argument).
	ClassNameIs	Determines whether an object is of a specific type.
	ClassParent	Returns the type of the immediate ancestor of a class.
	ClassType	Returns the class reference for the object's class.
	CleanupInstance	Performs finalization on long strings, variants, and interface variables within a class.
	Create	Creates and initializes an instance of TAggregate.
	DefaultHandler	Provides the interface for a method that processes message records.
	Destroy	Destroys an instance of TAggregate.
	Dispatch	Calls message-handling methods for the object, based on the contents of the Message parameter.
	Equals	Checks if the current instance and the parameter are equal.
	FieldAddress	This is the overview for the FieldAddress method overload.
	Free	Destroys an object and frees its associated memory, if necessary.
	FreeInstance	Deallocates memory allocated by a previous call to the System::TObject::NewInstance method.
	GetDisplayName	Specifies the name of the aggregate object as it appears in the Object Inspector.
	GetHashCode	Returns an integer containing the hash code.
	GetInterface	Retrieves a specified interface.
	GetInterfaceEntry	Returns the entry for a specific interface implemented in a class.
	GetInterfaceTable	Returns a pointer to a structure containing all of the interfaces implemented by a given class.
	GetNamePath	Returns a string used by the Object Inspector.
	GetNamePath	Returns the name of the object as it appears in the Object Inspector.
	InheritsFrom	Determines the relationship of two object types.
	InitInstance	Initializes a newly allocated object instance to all zeros and initializes the instance's virtual method table pointer.
	InstanceSize	Returns the size in bytes of each instance of the object type.
	MethodAddress	This is the overview for the MethodAddress method overload.
	MethodName	Returns the name of a class method by address.
	NewInstance	Allocates memory for an instance of an object type and returns a pointer to that new instance.
	SafeCallException	Handles exceptions in methods declared using the safecall calling convention.
	ToString	Returns a string containing the class name.
	UnitName	Returns a string containing the unit name.
	Value	Returns the calculated value of the aggregate.

Public Properties

	Name	Description
	AggHandle	Provides access to the aggregate handle.
	Collection	Specifies the TCollection instance to which the TCollectionItem belongs.
	DataSet	Indicates the client dataset whose records are summarized by this aggregate.
	DataSize	Indicates the number of bytes needed to store the aggregate's value.
	DataType	Indicates the data type of the calculated value.
	DisplayName	The name displayed in the Collection editor.
	ID	A unique, permanent index for the item.
	Index	Returns the item's position in the Items array of TCollection.
	InUse	Indicates whether the aggregate value is currently available.

Published Events

	Name	Description
	OnUpdate	Occurs when the value of the aggregate is recalculated.

Published Properties

	Name	Description
	Active	Indicates whether the aggregate should be calculated.
	AggregateName	Specifies the name user interface components use when describing the aggregate.
	Expression	Specifies the formula used to calculate the aggregate value.
	GroupingLevel	Specifies the set of records summarized by this aggregate.
	IndexName	Specifies the index that is used to define subgroups of records.
	Visible	Indicates whether controls should display the aggregated value.

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