Classes Namespace

This is namespace Classes.

Name	Description
Classes	The following table lists classes in this documentation.
Interfaces	The following table lists interfaces in this documentation.
Functions	The following table lists functions in this documentation.
Structs, Records, Enums	The following table lists structs, records, enums in this documentation.
Types	The following table lists types in this documentation.
Variables	The following table lists variables in this documentation.
Constants	The following table lists constants in this documentation.

Classes

	Name	Description
	EBitsError	EBitsError is the exception class for invalid attempts to access an array of boolean values.
	EClassNotFound	EClassNotFound is the exception class for the failure to find a specified component when reading from a stream.
	EComponentError	EComponentError is the exception class for registering and renaming components.
	EFCreateError	EFCreateError is the exception class for streaming file-creation errors.
	EFilerError	EFilerError is the exception class for component stream errors.
	EFileStreamError	EFileStreamError is the exception class for general stream errors.
	EFOpenError	EFOpenError is the exception class for file-opening errors during streaming.
	EInvalidImage	EInvalidImage is the exception class for unsuccessful attempts to read resources.
	EInvalidOperation	EInvalidOperation is the exception class for invalid operations on a component.
	EListError	EListError is the exception class for list and string errors.
	EMethodNotFound	Deprecated, please use EReadError.
	EOutOfResources	EOutOfResources is the exception class for unsuccessful attempts to allocate handles.
	EParserError	EParserError is the exception class for text-to-binary streaming conversion errors.
	EReadError	EReadError is the exception class for unsuccessful attempts to read data from a stream.
	EResNotFound	EResNotFound is the exception class for unlocatable resources.
	EStreamError	EStreamError is the exception class for streaming errors.
	EStringListError	EStringListError is the exception class for invalid listbox references.
	EThread	EThread is the exception class for thread synchronization errors.
	EWriteError	EWriteError is the exception class for unsuccessful attempts to write data to a stream.
	TBasicAction	TBasicAction is the ancestor class for all action objects.
	TBasicActionLink	TBasicActionLink is the base class for action link classes that handle the communication between actions and clients.
	TBits	TBits stores an array of Boolean values.
	TClassFinder	This is class Classes.TClassFinder.
	TCollection	TCollection is a container for TCollectionItem objects.
	TCollectionEnumerator	Enumerates through the TCollectionItems in a TCollection object.
	TCollectionItem	TCollectionItem represents an item in a collection.
	TComponent	TComponent is the common ancestor of all component classes.
	TComponentEnumerator	TComponentEnumerator allows the components within a containing component to be discovered.
	TCustomMemoryStream	TCustomMemoryStream is an abstract base class used as the common ancestor for memory streams.
	TDataModule	TDataModule centralizes the handling of nonvisual components in an application.
	TFiler	TFiler is the abstract base class for reader and writer objects, which are used for loading and saving components and their properties.
	TFileStream	TFileStream enables applications to read from and write to a file on disk.
	THandleStream	THandleStream enables applications to read from and write to communications resources identified by a handle.
	TInterfacedPersistent	TInterfacedPersistent is an ancestor for persistent objects that implement interfaces.
	TInterfaceList	TInterfaceList represents a list of interfaces.
	TInterfaceListEnumerator	Enumerates through the IInterfaces in a TInterfaceList.
	TList	TList stores an array of pointers.
	TListEnumerator	Enumerates through the objects in a TList.
	TMemoryStream	TMemoryStream is a stream that stores its data in dynamic memory.
	TOwnedCollection	TOwnedCollection is a collection that maintains information about its owner.
	TParser	TParser allows DFM files to be parsed.
	TPersistent	TPersistent is the ancestor for all objects that have assignment and streaming capabilities.
	TReader	TReader is a specialized filer that reads component data from an associated stream.
	TRecall	TRecall stores the properties of a persistent object so that they can be restored at a later time.
	TResourceStream	TResourceStream is a memory stream that provides access to the compiled resources in an application.
	TStream	TStream is the base class type for stream objects that can read from or write to various kinds of storage media, such as disk files, dynamic memory, and so on.
	TStreamAdapter	TStreamAdapter implements the IStream interface on a TStream object.
	TStringList	TStringList maintains a list of strings.
	TStrings	TStrings is the base class for objects that represent a list of strings.
	TStringsEnumerator	Enumerates through the strings of a TStrings object.
	TStringStream	TStringStream provides file-like access to information stored as a long string.
	TThread	TThread is an abstract class that enables creation of separate threads of execution in an application.
	TThreadList	TThreadList represents a thread-safe list.
	TWriter	TWriter is a specialized filer object that writes data to its associated stream.

Constants

Name	Description
fmCreate	Specifies a file to be created with a specific name.
MaxListSize	Defines the maximum capacity of certain list classes and types.
scAlt	Specifies that the Alt key was pressed in a short cut menu.
scCtrl	Specifies that the Ctrl key was pressed in a short cut menu.
scNone	Specifies that none of the Shift, Ctrl or Alt keys were pressed in a short cut menu.
scShift	Specifies that the Shift was pressed in a short cut menu.
soFromBeginning	Specifies that a stream seek operation should move relative to the stream beginning.
soFromCurrent	Specifies that a stream seek operation should move relative to the current position.
soFromEnd	Specifies that a stream seek operation should move relative to the stream end.
toEOF	Specifies a TParser End of file token.
toFloat	Specifies a TParser floating point number token.
toInteger	Specifies a TParser integer token.
toString	Specifies a TParser string token.
toSymbol	Specifies a TParser symbol token.
toWString	Specifies a TParser wide string token.

Functions

	Name	Description
	ActivateClassGroup	Activates a group of classes that derive from TPersistent.
	ActiveClassGroup	Activates a group of classes that derive from TPersistent.
	AllocateHWnd	DeallocateHWnd is used to destroy a hidden window created using AllocateHWnd.
	AncestorIsValid	AncestorIsValid determines if one component is an ancestor of another.
	BeginGlobalLoading	This is function Classes.BeginGlobalLoading.
	BinToHex	Converts a binary value into its hexadecimal representation.
	Bounds	Creates a TRect structure from the top-left coordinate, and width and height values of a rectangle.
	CheckSynchronize	Allows background threads to synchronize their execution with the main thread.
	ClassGroupOf	Returns the group of persistent classes a specified class or instance belongs to.
	ClassGroupOf	Returns the group of persistent classes a specified class or instance belongs to.
	CollectionsEqual	Compares the contents of two collections.
	CountGenerations	Returns the number of intermediate classes between a derived class and its ancestor.
	DeallocateHWnd	Frees a window that was created using AllocateHWnd.
	EndGlobalLoading	This is function Classes.EndGlobalLoading.
	ExtractStrings	Fills a string list with substrings parsed from a delimited list.
	FindClass	Finds and returns a class that is derived from TPersistent.
	FindGlobalComponent	Returns a top-level container component.
	FindIdentToInt	Returns the TIdentToInt conversion routine for a given data type.
	FindIntToIdent	Returns the TIntToIdent conversion routine for a given data type.
	FindNestedComponent	FindNestedComponent returns a component contained within another.
	FindRootDesigner	This is function Classes.FindRootDesigner.
	FreeObjectInstance	This is function Classes.FreeObjectInstance.
	GetClass	Returns a registered persistent class given its name.
	GetFixupInstanceNames	This is function Classes.GetFixupInstanceNames.
	GetFixupReferenceNames	This is function Classes.GetFixupReferenceNames.
	GetUltimateOwner	Returns the top-level owner of a specified persistent object.
	GetUltimateOwner	Returns the top-level owner of a specified persistent object.
	GetUltimateOwner	Returns the top-level owner of a specified persistent object.
	GlobalFixupReferences	This is function Classes.GlobalFixupReferences.
	GroupDescendentsWith	Adds a specified class to the group in which another class appears.
	HexToBin	Converts a string of hexadecimal digits to the corresponding binary value.
	IdentToInt	Uses a mapping array to convert string identifiers into their corresponding integer values.
	InitComponentRes	This is function Classes.InitComponentRes.
	InitInheritedComponent	Initializes streaming of a form file for an inherited root class.
	IntToIdent	Uses a mapping array to convert integers into their corresponding string identifiers.
	InvalidPoint	Indicates whether a specified point is equal to (-1,-1).
	InvalidPoint	Indicates whether a specified point is equal to (-1,-1).
	InvalidPoint	Indicates whether a specified point is equal to (-1,-1).
	IsDefaultPropertyValue	This is function Classes.IsDefaultPropertyValue.
	IsUniqueGlobalComponentName	Indicates whether a proposed component name is unambiguous.
	LineStart	Finds the end of the last whole line in a buffer.
	MakeObjectInstance	This is function Classes.MakeObjectInstance.
	NotifyGlobalLoading	This is function Classes.NotifyGlobalLoading.
	ObjectBinaryToText	Converts the binary representation of an object into more readily understandable text.
	ObjectBinaryToText	Converts the binary representation of an object into more readily understandable text.
	ObjectResourceToText	Converts the binary representation of an object resource into more readily understandable text.
	ObjectResourceToText	Converts the binary representation of an object resource into more readily understandable text.
	ObjectTextToBinary	Converts a symbolic text representation of an object into the binary version that is used to save the object to files or memory streams.
	ObjectTextToBinary	Converts a symbolic text representation of an object into the binary version that is used to save the object to files or memory streams.
	ObjectTextToResource	Converts a symbolic text representation of an object into an internal binary representation.
	ObjectTextToResource	Converts a symbolic text representation of an object into an internal binary representation.
	Point	Creates a TPoint structure from a pair of coordinates.
	PointsEqual	Indicates whether two points have the same coordinates.
	PointsEqual	Indicates whether two points have the same coordinates.
	ReadComponentRes	Reads components and their properties from a specified resource.
	ReadComponentResEx	Reads a component from a resource.
	ReadComponentResFile	Reads components and their properties from a specified Windows resource file.
	Rect	Creates a TRect structure from a set of coordinates.
	Rect	Creates a TRect structure from a set of coordinates.
	RedirectFixupReferences	This is function Classes.RedirectFixupReferences.
	RegisterClass	Registers a class of persistent object so that it's class type can be retrieved.
	RegisterClassAlias	Registers a class that is identical to another class except for the name.
	RegisterClasses	Registers a set of classes.
	RegisterComponents	Registers a set of components so that they all appear on the same page of the component palette.
	RegisterFindGlobalComponentProc	This is function Classes.RegisterFindGlobalComponentProc.
	RegisterIntegerConsts	Registers conversion functions for string identifiers that represent type values.
	RegisterNoIcon	Registers a set of components but does not add them to the component palette.
	RegisterNonActiveX	Prevents a set of components from being made available to the ActiveX wizard.
	RemoveFixupReferences	This is function Classes.RemoveFixupReferences.
	RemoveFixups	This is function Classes.RemoveFixups.
	SmallPoint	Creates a TSmallPoint structure from a pair of coordinates.
	StartClassGroup	Starts a class group derived from TPersistent.
	TestStreamFormat	Identifies the format of a form file when reading it from a stream.
	UnRegisterClass	Unregisters an object class.
	UnRegisterClasses	Unregisters a set of classes.
	UnregisterFindGlobalComponentProc	This is function Classes.UnregisterFindGlobalComponentProc.
	UnregisterIntegerConsts	Unregisters conversion functions for string identifiers that represent type values.
	UnRegisterModuleClasses	Unregisters all classes defined in a specified module.
	WriteComponentResFile	Writes components and their properties to a file using a resource file format.

Interfaces

	Name	Description
	IDesignerNotify	IDesignerNotify is the interface for responding to notifications about changes to components in the designer.
	IInterfaceComponentReference	IInterfaceComponentReference is the interface for responding to requests for retrieving components.
	IInterfaceList	IInterfaceList provides access to a list of interfaces.
	IStreamPersist	IStreamPersist is the interface for responding to requests to load/save an object from/to a persistent stream.
	IStringsAdapter	This is class Classes.IStringsAdapter.
	IVarStreamable	IVarStreamable is the interface for loading and saving the values of Variants.
	IVCLComObject	This is class Classes.IVCLComObject.

Structs, Records, Enums

	Name	Description
	TActiveXRegType	TActiveXRegType is used when excluding a component class from the ActiveX Wizard.
	TAlignment	TAlignment specifies how text is aligned within a control.
	TBiDiMode	TBiDiMode specifies the reading order (bidirectional mode) of a control.
	TCollectionNotification	TCollectionNotification indicates the type of change that is made to the items in a collection.
	TDuplicates	TDuplicates indicates the response when an application attempts to add a duplicate entry to a list.
	TFilerFlag	TFilerFlag indicates information about how a filer should read or write a component and TFilerFlags is a set of TFilerFlag values.
	THelpType	THelpType indicates whether components invoke the help system using a context ID or a keyword.
	TIdentMapEntry	TIdentMapEntry is used to perform ident string to integer value mapping.
	TListAssignOp	TListAssignOp indicates how two lists should be merged.
	TListNotification	TListNotification defines list processing action types.
	TOperation	TOperation represents the types of operations whose occurrence is broadcast by the Notification method.
	TSeekOrigin	TSeekOrigin indicates where to start a seek operation.
	TStreamOriginalFormat	TStreamOriginalFormat indicates the format in which a form file is saved.
	TStreamOwnership	TStreamOwnership indicates whether a stream object should be freed by the object that uses it.
	TStringItem	TStringItem defines a TStringList entry.
	TSynchronizeRecord	This is record Classes.TSynchronizeRecord.
	TThreadPriority	TThreadPriority indicates the scheduling priority of a thread object on Windows.
	TValueType	TValueType defines the kinds of values written to and read from filer objects.
	TVerticalAlignment	TVerticalAlignment specifies how text is vertically aligned within a control.

Types

Name	Description
PPointerList	PPointerList is a pointer to a TPointerList type.
PStringItem	PStringItem is a TStringItem pointer.
PStringItemList	PStringItemList is a TStringItemList pointer.
PSynchronizeRecord	This is type Classes.PSynchronizeRecord.
TAncestorNotFoundEvent	TAncestorNotFoundEvent is a procedure called by the TReader class OnAncestorNotFound event.
TBasicActionClass	TBasicActionClass defines the metaclass for TBasicAction.
TBasicActionLinkClass	TBasicActionLinkClass defines the metaclass for TBasicActionLink.
TCollectionItemClass	TCollectionItemClass defines the metaclass for TCollectionItem.
TComponentClass	TComponentClass defines the metaclass for TComponent.
TComponentName	TComponentName is the type for the Name property of all components.
TComponentState	TComponentState is a set of flags that describe the current state of a component.
TComponentStyle	TComponentStyle is a set of flags that describe the current Style of a component.
TCreateComponentEvent	TCreateComponentEvent is a type of procedure called by the TReader class OnCreateComponentEvent event.
TFilerFlags	TFilerFlags is the set of TFilerFlag values.
TFindAncestorEvent	TFindAncestorEvent is a procedure called by the TWriter class OnFindAncestor event.
TFindComponentClassEvent	This is type Classes.TFindComponentClassEvent.
TFindComponentInstanceEvent	This is type Classes.TFindComponentInstanceEvent.
TFindGlobalComponent	This is type Classes.TFindGlobalComponent.
TFindMethodEvent	TFindMethodEvent is a procedure called by the TReader class OnFindMethod event.
TFindMethodInstanceEvent	TFindMethodInstanceEvent is a procedure called by the TReader class OnFindMethodInstance event.
TFindMethodNameEvent	TFindMethodNameEvent is a procedure called by the TWriter class OnFindMethodName event.
TGetChildProc	TGetChildProc is a type of procedure called used internally by the TComponent class.
TGetClass	TGetClass is a callback procedure used by the TClassFinder class.
TGetLookupInfoEvent	This is type Classes.TGetLookupInfoEvent.
TGetModuleProc	This is type Classes.TGetModuleProc.
TGetStrProc	TGetStrProc is a general purpose type of callback procedure invoked for each of a set of strings.
THelpContext	THelpContext is the range of values that a HelpContext value may have.
TIdentToInt	TIdentToInt is a type of callback function used by the IdentToInt routine.
TIntToIdent	TIntToIdent is a type of callback function used by the IntToIdent routine.
TIsUniqueGlobalComponentName	TIsUniqueGlobalComponentName is a type of function used by IsUniqueGlobalComponentName.
TLeftRight	TLeftRight is a subset of TAlignment that allows left or right justification.
TListSortCompare	TListSortCompare is a type of callback function called used internally by the TList class.
TNotifyEvent	TNotifyEvent is used for events that do not require parameters.
TParserErrorEvent	TParserErrorEvent is a callback procedure used by the TClassFinder class.
TPersistentClass	TPersistentClass defines the metaclass for TPersistent.
TPointerList	TPointerList is an array of pointers.
TReadComponentsProc	TReadComponentsProc is a type of callback procedure called used internally by the TReader class ReadComponents method.
TReaderError	TReaderError is a type of callback procedure called used internally by the TReader class ReadComponents method.
TReaderProc	TReaderProc is a type of callback procedure called used by TFiler and descendant DefineProperty methods.
TReferenceNameEvent	TReferenceNameEvent is a procedure called by the TReader class OnReferenceNameEvent event.
TSetNameEvent	TSetNameEvent is a procedure called by the TReader class OnSetNameEvent event.
TShiftState	TShiftState indicates the state of the Alt, Ctrl, and Shift keys and the mouse buttons.
TShortCut	TStringsDefined defines an enumeration of string delimiter names.
TStreamProc	TStreamProc is a type of callback procedure called used by TFiler and descendant DefineBinaryProperty methods.
TStringItemList	TStringItemList defines an array of TStringItems.
TStringListSortCompare	TStringListSortCompare is a type of callback function called used internally by the TStringList class.
TStringsDefined	This is type Classes.TStringsDefined.
TThreadMethod	This is type Classes.TThreadMethod.
TTopBottom	TTopBottom is a subset of TVerticalAlignment that allows top or bottom alignment.
TWndMethod	TWndMethod is the type for Windows message procedures.
TWriterProc	TWriterProc is a type of callback procedure called used by TFiler and descendant DefineProperty methods.

Variables

Name	Description
AddDataModule	Defines a procedure to be called when a TDataModule class is created.
ApplicationHandleException	This is variable Classes.ApplicationHandleException.
ApplicationShowException	This is variable Classes.ApplicationShowException.
CreateVCLComObjectProc	This is variable Classes.CreateVCLComObjectProc.
CurrentGroup	Keeps track of which objects are associated with which packages.
GlobalNameSpace	This is variable Classes.GlobalNameSpace.
IsUniqueGlobalComponentNameProc	IsUniqueGlobalComponentNameProc is called by IsUniqueGlobalComponentName.
RegisterComponentsProc	RegisterComponentsProc is called by RegisterComponents.
RegisterNoIconProc	RegisterNoIconProc is called by RegisterNoIcon.
RegisterNonActiveXProc	RegisterNonActiveXProc is called by RegisterNonActiveX.
RemoveDataModule	Defines a procedure to be called when a TDataModule class is destroyed.
WakeMainThread	Represents a method (event handler) that is forced into the main thread’s queue.

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