DelphiVCL

Object	TObject is the ultimate ancestor of all objects and components.
StyleManager	Handles styles-related operations.
Stream	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.
Monitor	TMonitor represents a monitor on which an application runs.
CustomStyleServices	TCustomStyleServices is a class that provides access to style functionality.
Persistent	TPersistent is the ancestor for all objects that have assignment and streaming capabilities.
Strings	TStrings is the base class for objects that represent a list of strings.
Picture	TPicture contains a bitmap, icon, metafile graphic, or user-defined graphic.
Collection	TCollection is a container for TCollectionItem objects.
Canvas	TCanvas provides an abstract drawing space for objects that must render their own images.
Graphic	TGraphic is the abstract base class type for objects such as icons, bitmaps, and metafiles that can store and display visual images.
Bitmap	TBitmap is an encapsulation of a Windows bitmap (HBITMAP), including its palette (HPALETTE).
Icon	TIcon is an encapsulation of a Windows icon.
Metafile	TMetafile is an encapsulation of the Win32 Enhanced metafile.
Component	TComponent is the common ancestor of all component classes.
Timer	TTimer encapsulates the Windows API timer functions.
OpenDialog	TOpenDialog displays a file-selection dialog.
MenuItem	TMenuItem describes the properties of an item in a menu.
Menu	TMenu is the base type for menu components such as TMainMenu and TPopupMenu.
FileOpenDialog	Class for Vista and newer Windows operating systems style file open dialogs.
ContainedActionList	The base class for list of actions, without the published properties.
Control	TControl is the base class for all components that are visible at run time.
CustomBindingsList	Represents the base class for the binding list.
BasicBindComponent	Wrapper for Pascal class TBasicBindComponent
BasicAction	TBasicAction is the ancestor class for all action objects.
BaseBindScopeComponent	Base class for the binding scope component.
BaseLinkingBindSource	Base class for scope with supports linking
ContainedAction	TContainedAction is the base class for actions that can be grouped by category and that can appear in action lists.
BindingsList	Implements the bindings list component.
BoundLabel	TBoundLabel is the type of a labeled edit control's label.
CustomControl	Base class for controls that wrap Windows screen objects but perform their own rendering.
Label	TLabel is a nonwindowed control that displays text on a form.
WinControl	TWinControl is the base class for all controls that are wrappers for Microsoft Windows screen objects.
CustomActionList	The usual list of actions (without published properties) in VCL
MainMenu	TMainMenu encapsulates a menu bar and its accompanying drop-down menus for a form.
PopupMenu	TPopupMenu encapsulates the properties, methods, and events of a pop-up menu.
SaveDialog	TSaveDialog displays a "Save As" dialog for saving files.
ActionList	TActionList maintains a list of actions that can be used by components and controls such as menu items and buttons.
MediaPlayer	TMediaPlayer controls devices that provide a Media Control Interface (MCI) driver.
CustomToggleSwitch	The base class for TToggleSwitch.
CustomActivityIndicator	The base class for TActivityIndicator.
CustomAction	TCustomAction is the base class for VCL actions intended to be used with menu items and controls.
Action	TAction is the base class for VCL action objects.
BaseObjectBindSource	Is a bind source that supports adapters to connect to different types of data.
CustomPrototypeBindSource	Is a base class that implements a bind source for creating sample data.
ActivityIndicator	An animated rotating display indicating that the application is performing some activity.
ToggleSwitch	A clickable control that allows a user to toggle between an On state and an Off state.
PrototypeBindSource	Is a bind source for creating sample data.
ContainedBindComponent	Base class for all common binding components descending from it.
BindComponentDelegate	Is a binding component that wraps one or more other binding components.
LinkPropertyToFieldDelegate	Is a binding component that wraps another binding component and references a component property, data source, and field name.
LinkControlDelegate	Is a binding component that wraps another binding component and references a control.
CustomLinkPropertyToField	Represents the base class for linking a property of a component to a field.
LinkControlToFieldDelegate	Is a binding component that wraps another binding component and references a control, data source, and field.
LinkPropertyToField	Links the property of a component to a field.
CustomLinkControlToField	Represents the base class for linking a control to a field.
CustomLinkListControlToField	Represents the base class for linking a list control to a field.
LinkControlToField	Links a list control to a field.
LinkListControlToField	Links a list control to a field.
BitBtn	TBitBtn is a push button control that can include a bitmap on its face.
Button	TButton is a push button control.
CheckBox	TCheckBox represents a check box that can be on (checked) or off (unchecked).
ColorBox	TColorBox represents a combo box that lets users select a color.
ComboBox	TComboBox combines an edit box with a scrollable list.
ControlBar	TControlBar manages the layout of toolbar components.
CustomGrid	TCustomGrid is the base type for all components that present information in a two-dimensional grid.
CustomEdit	TCustomEdit is the base class from which all edit-box and memo controls are derived.
CustomForm	TCustomForm is the base class from which to derive a window such as a form or dialog.
CustomStatusBar	TCustomStatusBar is the base class for objects that represent status bars.
CustomTabControl	TCustomTabControl is the base type for tab control components such as TTabControl and TPageControl.
DateTimePicker	TDateTimePicker displays a list box for entering dates or times.
GroupBox	TGroupBox represents a Windows group box.
Header	THeader is a sectioned visual control that displays text and allows each section to be resized with the mouse.
LabeledEdit	TLabeledEdit is an edit control that has an associated label.
ListBox	TListBox displays a collection of items in a scrollable list.
Notebook	TNotebook displays multiple pages, each with its own set of controls.
Page	Specifies a page in a TNotebook control.
PageControl	TPageControl is a set of pages used to make a multiple page dialog box.
Panel	Wrapper for Pascal class TPanel
RadioButton	TRadioButton is a wrapper for a system radio button.
RadioGroup	TRadioGroup represents a group of radio buttons that function together.
ScrollBar	Wrapper for Pascal class TScrollBar
SpinButton	TSpinButton allows the user to navigate through a range of values using the arrow buttons.
StaticText	TStaticText is a windowed control that displays text on a form.
TabSheet	TTabSheet is an individual page in a TPageControl object.
ToolBar	TToolBar manages tool buttons and other controls, arranging them in rows and automatically adjusting their sizes and positions.
TrackBar	TTrackBar is a wrapper for a track bar control.
CustomDrawGrid	TCustomDrawGrid is the base class for grids that publish events for painting and manipulating the cells in the grid.
CustomMemo	TCustomMemo is the base type for memo components, which are multiline edit boxes, including TMemo and TDBMemo.
CustomNumberBox	TCustomEdit is the base class from which all edit-box and memo controls are derived.
Edit	TEdit is a wrapper for a Windows single-line edit control.
SpinEdit	TSpinEdit combines a TEdit box with a TSpinButton.
Form	TForm represents a standard application window (form).
StatusBar	TStatusBar represents a status bar.
TabControl	TTabControl is a tab set that has the appearance of notebook dividers.
DrawGrid	TDrawGrid represents a grid control that displays information in column and row format.
Memo	TMemo is a wrapper for a Windows multiline edit control.
NumberBox	TNumberBox is a numeric input control that supports the input of integer numbers, floating point numbers with a given set of decimal digits and proper formatting, and currency values.
StringGrid	TStringGrid represents a grid control designed to simplify the handling of strings and associated objects.
CustomMemoryStream	TCustomMemoryStream is an abstract base class used as the common ancestor for memory streams.
HandleStream	THandleStream enables applications to read from and write to communications resources identified by a handle.
MemoryStream	TMemoryStream is a stream that stores its data in dynamic memory.
ResourceStream	TResourceStream is a memory stream that provides access to the compiled resources in an application.
FileStream	TFileStream enables applications to read from and write to a file on disk.
BytesStream	TBytesStream is a stream that stores its data in bytes.
BufferedFileStream	TBufferedFileStream adds buffering support to TFileStream.
StringStream	TStringStream provides file-like access to information stored as a long string.