System.Classes

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Package	rtl270.bpl

Classes

ComponentPlatformsAttribute	ComponentPlatformsAttribute provides platform-specific run-time information.
DefaultAttribute	DefaultAttribute is an extension of TDefaultAttributeBase.
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.
ELoginCredentialError	ELoginCredentialError is the exception class for handling invalid login credentials.
EMethodNotFound	Deprecated, please use EReadError.
EObserverException	EObserverException is the exception class for observer exceptions.
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 resources that were not found.
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.
EThreadExternalException	EThreadExternalException is the exception class for methods called from external threads.
EWriteError	EWriteError is the exception class for unsuccessful attempts to write data to a stream.
IControlValueObserver	Interface for value changing observers.
IDesignerNotify	IDesignerNotify is the interface for responding to notifications about changes to components in the designer.
IEditFormatLink
IEditGridLinkObserver	Interface for IEditLinkObserver.
IEditLinkObserver	Interface for link managing observers.
IInterfaceComponentReference	IInterfaceComponentReference is the interface for responding to requests for retrieving components.
IInterfaceList	IInterfaceList provides access to a list of interfaces.
IInterfaceListEx	IInterfaceListEx provides access to a list of interfaces.
IIteratorLinkObserver
IMultiCastObserver	Multiple cast interface for IObserver.
IObserver	Interface that implements an observer pattern that is used in order to get notifications on certain UI (user interface) changes of controls such as an edit box or a label.
IObserverTrack	Interface used for tracking notifications.
IPositionLinkObserver	Interface for position changing notifications.
IPositionLinkObserver170
ISingleCastObserver	Single cast interface for IObserver.
IStreamPersist	IStreamPersist is the interface for responding to requests to load/save an object from/to a persistent stream.
IStringsAdapter	Maintains a link between TStrings and IStrings implementations.
IVarStreamable	IVarStreamable is the interface for loading and saving the values of Variants.
IVCLComObject	Interface used for getting information from VCL objects.
NoDefaultAttribute	NoDefaultAttribute is an extension of TDefaultAttributeBase.
ObservableMemberAttribute	ObservableMemberAttribute is a similar class to TCustomAttribute.
ObservableMemberExtAttribute
StoredAttribute	StoredAttribute is a similar class to TCustomAttribute.
TBaseAsyncResult	Base class for implementing all asynchronous procedure calls.
TBasicAction	TBasicAction is the ancestor class for all action objects.
TBasicActionClass	TBasicActionClass defines the metaclass for TBasicAction.
TBasicActionLink	TBasicActionLink is the base class for action link classes that handle the communication between actions and clients.
TBasicActionLinkClass	TBasicActionLinkClass defines the metaclass for TBasicActionLink.
TBinaryReader	TBinaryReader reads data as binary values.
TBinaryWriter	TBinaryWriter writes data as binary values.
TBits	TBits stores an array of Boolean values.
TBufferedFileStream	TBufferedFileStream adds buffering support to TFileStream.
TBytesStream	TBytesStream is a stream that stores its data in bytes.
TClassFinder	TClassFinder allows registered persistent classes to be retrieved.
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.
TCollectionItemClass	TCollectionItemClass defines the metaclass for TCollectionItem.
TComponent	TComponent is the common ancestor of all component classes.
TComponentClass	TComponentClass defines the metaclass for TComponent.
TComponentEnumerator	TComponentEnumerator allows the components within a containing component to be discovered.
TComponentInterfaceDelegate
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.
TDefaultAttributeBase	TDefaultAttributeBase is a base class for default attributes.
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.
TLinkObservers	Interface used for link notifications.
TLinkObserversHelper
TList	TList stores an array of pointers.
TListEnumerator	Enumerates through the objects in a TList.
TLoginCredentialService	TLoginCredentialService provides functionality for login action, regardless of framework.
TMemoryStream	TMemoryStream is a stream that stores its data in dynamic memory.
TObserverMapping	TObserverMapping stores all of the currently set TObservers.
TObserverMappingHelper
TObservers	TObservers implements an observer pattern that is used in order to get notifications on certain UI (user interface) changes of controls such as an edit box or a label, while using LiveBindings.
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.
TPersistentClass	TPersistentClass defines the metaclass for TPersistent.
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.
TStreamReader	Character stream reader.
TStreamWriter	Writer for characters to stream.
TStringList	TStringList maintains a list of strings.
TStringReader	Reader for a string.
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.
TStringWriter	Writer for a string.
TTextReader	Reader for sequence of characters.
TTextWriter	Writer of sequence of characters.
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.

Routines

ActivateClassGroup	Activates a group of classes that derive from TPersistent.
ActiveClassGroup	Activates a group of classes that derive from TPersistent.
AllocateHWnd	Creates a window that implements a specified window procedure.
AncestorIsValid	AncestorIsValid determines if one component is an ancestor of another.
BeginGlobalLoading
BinToHex	Converts a binary value into a string that is its hexadecimal representation.
Bounds	Creates a TRect structure from the top-left coordinate, and width and height values of a rectangle.
CheckForCycles
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.
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
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
FreeObjectInstance	Frees a block of memory that was allocated by the MakeObjectInstance.
GetClass	Returns a registered persistent class given its name.
GetComponentFieldAddress
GetFixupInstanceNames
GetFixupReferenceNames
GetResourceName
GetUltimateOwner	Returns the top-level owner of a specified persistent object.
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
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).
IsDefaultPropertyValue
IsUniqueGlobalComponentName	Indicates whether a proposed component name is unambiguous.
LineStart	Finds the end of the last whole line in a buffer.
MakeObjectInstance	Allocates a block of memory to be used by an instance of a class.
NotifyGlobalLoading
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.
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.
Point	Creates a TPoint structure from a pair of coordinates.
PointsEqual	Indicates whether two points have the same coordinates.
ReadComponentDeltaRes
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.
RedirectFixupReferences
RegisterClass	Registers a class of persistent object so that its 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 the ComponentClasses components so that they all appear on the same Page of the Tool Palette.
RegisterFindGlobalComponentProc	Used for registering component finding functions.
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
RemoveFixups
ReportClassGroups
SetComponentFieldAddressCache
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	Used for unregistering component finding functions.
UnregisterIntegerConsts	Unregisters conversion functions for string identifiers that represent type values.
UnRegisterModuleClasses	Unregisters all classes defined in a specified module.
Write16bitResourceHeader
Write32bitResourceHeader
WriteComponentResFile	Writes components and their properties to a file using a resource file format.
WriteObjectResourceHeader

Types

PPointerList	PPointerList is a pointer to a TPointerList type.
PStringItem	PStringItem is a TStringItem pointer.
PStringItemList	PStringItemList is a TStringItemList pointer.
System_Classes
System_Classes__23
System_Classes__55
System_Classes__65
TActionEvent	TActionEvent is the method pointer type used to define updating and execution events of actions.
TActiveXRegType	TActiveXRegType is used when excluding a component class from the ActiveX Wizard.
TAlignment	TAlignment specifies how text is aligned within a control.
TAncestorNotFoundEvent	TAncestorNotFoundEvent is a procedure called by the TReader class OnAncestorNotFound event.
TAsyncCallback
TAsyncCallbackEvent
TAsyncConstArrayFunc
TAsyncConstArrayFunctionEvent
TAsyncConstArrayProc
TAsyncConstArrayProcedureEvent
TAsyncFunctionEvent
TAsyncProcedureEvent
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.
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 OnCreateComponent event.
TDesignInfo
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.
TFilerFlags	TFilerFlags is the set of TFilerFlag values.
TFindAncestorEvent	TFindAncestorEvent is a procedure called by the TWriter class OnFindAncestor event.
TFindComponentClassEvent	TFindComponentClassEvent is the type of the OnFindComponentClass event handler.
TFindComponentInstanceEvent	TFindComponentInstanceEvent is a procedure called by the TReader class OnFindMethodInstance event.
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	For internal use only.
TGetClass	TGetClass is a callback procedure used by the TClassFinder class.
TGetDeltaStreamsEvent
TGetLookupInfoEvent
TGetModuleProc
TGetStreamProc
TGetStrProc	TGetStrProc is a general purpose type of callback procedure invoked for each of a set of strings.
THelpContext	The range of values that HelpContext values may have.
THelpType	THelpType indicates whether components invoke the help system using a context ID or a keyword.
THintEvent	THintEvent is the method pointer type used to define OnHint events.
TIdentMapEntry	TIdentMapEntry is used to perform ident string to integer value mapping.
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.
TListAssignOp	TListAssignOp indicates how two lists should be merged.
TListNotification	TListNotification defines list processing action types.
TListSortCompare	TListSortCompare is a type of callback function called used internally by the TList class.
TListSortCompareFunc
TNotifyEvent	TNotifyEvent is used for events that do not require parameters.
TObserverGetCurrentEvent
TObserverToggleEvent
TOperation	TOperation represents the types of operations whose occurrence is broadcast by the Notification method.
TParserErrorEvent	TParserErrorEvent is a callback procedure used by the TClassFinder class.
TPlatformIds
TPointerList	TPointerList is an array of pointers.
TPostFoundCycleProc
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 OnReferenceName event.
TSeekOrigin	TSeekOrigin indicates where to start a seek operation.
TSetNameEvent	TSetNameEvent is a procedure called by the TReader class OnSetName event.
TShiftState	Indicates the state of the modifier keys, the mouse buttons, or the touch devices.
TShortCut	TShortCut defines a data type that can hold the representation of a key combination or shortcut, that is, of a main key and optionally one or more modifier keys, such as SHIFT or ALT.
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.
TStreamProc	TStreamProc is a type of callback procedure called used by TFiler and descendant DefineBinaryProperty methods.
TStringItem	TStringItem defines a TStringList entry.
TStringItemList	TStringItemList defines an array of TStringItems.
TStringListSortCompare	TStringListSortCompare is a type of callback function called used internally by the TStringList class.
TStringsDefined	TStringsDefined defines an enumeration of string delimiter names.
TStringsOption	Represents a set of TStrings boolean properties.
TStringsOptions	Set of boolean properties.
TThreadMethod
TThreadPriority	TThreadPriority indicates the scheduling priority of a thread object on Windows.
TThreadProcedure
TTopBottom	TTopBottom is a subset of TVerticalAlignment that allows top or bottom alignment.
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.
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

AddDataModule	Defines a procedure to be called when a TDataModule class is created.
ApplicationHandleException	Defines a procedure that is called to handle an Exception.
ApplicationShowException	Defines a procedure to be called when an Exception is raised.
CreateVCLComObjectProc
CurrentGroup	Keeps track of which objects are associated with which packages.
GlobalNameSpace	GlobalNameSpace is used internally by the VCL framework.
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.
SyncEvent
WakeMainThread	Represents a method (event handler) that is forced into the main thread's queue.

Constants

fmCreate	fmCreate: Integer = $FF00;
MaxListSize	MaxListSize: Integer = $7FFFFFF;
pfidAndroid	pfidAndroid: Integer = $8010;
pfidiOS	pfidiOS: Integer = $10448;
pfidLinux	pfidLinux: Integer = $80;
pfidOSX	pfidOSX: Integer = $1004;
pfidWindows	pfidWindows: Integer = 3;
pidAllPlatforms	pidAllPlatforms: Integer = $194DF;
pidAndroid	pidAndroid: Integer = $10;
pidAndroid32Arm	pidAndroid32Arm: Integer = $10;
pidAndroid64Arm	pidAndroid64Arm: Integer = $8000;
pidiOSDevice	pidiOSDevice: Integer = $40;
pidiOSDevice32	pidiOSDevice32: Integer = $40;
pidiOSDevice64	pidiOSDevice64: Integer = $400;
pidiOSSimulator	pidiOSSimulator: Integer = 8;
pidiOSSimulator32	pidiOSSimulator32: Integer = 8;
pidiOSSimulator64	pidiOSSimulator64: Integer = $10000;
pidLinux32	pidLinux32: Integer = $20;
pidLinux32Arm	pidLinux32Arm: Integer = $2000;
pidLinux64	pidLinux64: Integer = $80;
pidLinux64Arm	pidLinux64Arm: Integer = $4000;
pidOSX32	pidOSX32: Integer = 4;
pidOSX64	pidOSX64: Integer = $1000;
pidWin32	pidWin32: Integer = 1;
pidWin64	pidWin64: Integer = 2;
pidWinARM32	pidWinARM32: Integer = $800;
pidWinIoT32	pidWinIoT32: Integer = $200;
pidWinNX32	pidWinNX32: Integer = $100;
scAlt	scAlt: Integer = $8000;
scCommand	scCommand: Integer = $1000;
scCtrl	scCtrl: Integer = $4000;
scNone	scNone: Integer = 0;
scShift	scShift: Integer = $2000;
soFromBeginning	soFromBeginning: Integer = 0;
soFromCurrent	soFromCurrent: Integer = 1;
soFromEnd	soFromEnd: Integer = 2;
toEOF	toEOF: Char = 0;
toFloat	toFloat: Char = 4;
toInteger	toInteger: Char = 3;
toString	toString: Char = 2;
toSymbol	toSymbol: Char = 1;
toWString	toWString: Char = 5;