ComboBox#

Qualified name: delphivcl.ComboBox

class ComboBox#

Bases: CustomListControl

TComboBox combines an edit box with a scrollable list. A TComboBox component is an edit box with a scrollable drop-down list attached to it. Users can select an item from the list or type directly into the edit box.

Note: The width of the button in a TComboBox is equal to the width that Windows uses for scrollbars. This width depends on the color scheme that the user has chosen (by right-clicking the desktop, selecting Properties, and choosing Appearance). If you carefully size your combo box so all the text is visible, then a user running under a different color scheme may find that the text is obscured by the button. One solution is to set the scrollbar wide when developing the application. Most color schemes use a scrollbar that is at most 21 pixels wide.

Methods

`CanFocus`	Indicates whether a control can receive focus.
`SetFocus`	Gives the input focus to the control.

Attributes

`Action`	Specifies the action associated with the control.
`Align`	Determines how the control aligns within its container (parent control).
`AlignDisabled`	Indicates child control realignment disabled.
`AlignWithMargins`	Specifies whether a control should be constrained by margins.
`Anchors`	Specifies how the control is anchored to its parent.
`AutoCloseUp`	<Delphi property AutoCloseUp of type TComboBox at 211414C8810>
`AutoComplete`	<Delphi property AutoComplete of type TComboBox at 211414C84D0>
`AutoCompleteDelay`	<Delphi property AutoCompleteDelay of type TComboBox at 211414C85A0>
`AutoDropDown`	<Delphi property AutoDropDown of type TComboBox at 211414C8670>
`AutoDropDownWidth`	<Delphi property AutoDropDownWidth of type TComboBox at 211414C8740>
`BevelEdges`	Specifies which edges of the control are beveled.
`BevelInner`	Specifies the cut of the inner bevel.
`BevelKind`	Specifies the control's bevel style.
`BevelOuter`	Specifies the cut of the outer bevel.
`BiDiMode`	Specifies the bidirectional mode for the control.
`BoundsRect`	Specifies the bounding rectangle of the control, expressed in the coordinate system of the parent control.
`Brush`	Determines the color and pattern used for painting the background of the control.
`CanUndoSelText`	<Delphi property CanUndoSelText of type TComboBox at 211414CA2E0>
`CharCase`	<Delphi property CharCase of type TComboBox at 211414C8E90>
`ClassName`	Returns the TObject.ClassName
`ClientHeight`	Specifies the height of the control's client area in pixels.
`ClientOrigin`	Specifies the screen coordinates (in pixels) of the upper-left corner of a control's client area.
`ClientRect`	Specifies the size of a control's client area in pixels.
`ClientWidth`	Specifies the horizontal size of the control's client area in pixels.
`Color`	Specifies the background color of the control.
`ComObject`	Specifies the interface reference implemented by the component.
`ComponentCount`	Indicates the number of components owned by the component.
`ComponentIndex`	Indicates the position of the component in its owner's Components property array.
`ComponentState`	Describes the current state of the component, indicating when a component needs to avoid certain actions.
`ComponentStyle`	Governs the behavior of the component.
`Components`	<Delphi indexed property Components of type TComponent at 21141642500>
`Constraints`	Specifies the size constraints for the control.
`ControlCount`	Returns the count of contained controls
`ControlState`	Specifies the current state of a control at run time.
`ControlStyle`	Determines style characteristics of the control.
`Controls`	Returns an iterator over contained controls
`Ctl3D`	Determines whether a control has a three-dimensional (3-D) or two-dimensional look.
`CurrentPPI`	Embarcadero Technologies does not currently have any additional information.
`Cursor`	Specifies the image used to represent the mouse pointer when it passes into the region covered by the control.
`CustomHint`	CustomHint is a custom hint for the control.
`DesignInfo`	Contains information used by the Form designer.
`DockClientCount`	Specifies the number of controls that are docked on the windowed control.
`DockClients`	<Delphi indexed property DockClients of type TWinControl at 211416EE520>
`DockManager`	Specifies the control's docking manager interface.
`DockOrientation`	DockOrientation specifies how the control is docked relative to other controls docked in the same parent.
`DockSite`	Specifies whether the control can be the target of drag-and-dock operations.
`DoubleBuffered`	Determines whether the control's image is rendered directly to the window or painted to an in-memory bitmap first.
`DragCursor`	Specifies the image used to represent the mouse pointer when the control is being dragged.
`DragKind`	Specifies whether the control is being dragged normally or for docking.
`DragMode`	Specifies how the control initiates drag-and-drop or drag-and-dock operations.
`DropDownCount`	<Delphi property DropDownCount of type TComboBox at 211414C9510>
`DropDownWidth`	<Delphi property DropDownWidth of type TComboBox at 211414C95E0>
`Enabled`	Controls whether the control responds to mouse, keyboard, and timer events.
`ExplicitHeight`	Specifies the explicit vertical size of the control in pixels.
`ExplicitLeft`	Specifies the explicit horizontal pixel coordinate of the left edge of a component relative to its parent.
`ExplicitTop`	Specifies the explicit vertical pixel coordinate of the top edge of a component relative to its parent.
`ExplicitWidth`	Specifies the explicit horizontal size of the control in pixels.
`ExtendedUI`	<Delphi property ExtendedUI of type TComboBox at 211414C9780>
`Floating`	Specifies whether the control is floating.
`FloatingDockSiteClass`	Specifies the class of the temporary control that hosts the control when it is floating.
`Focused`	Determines whether the control has input focus.
`Font`	Specifies the attributes of text written on or in the control.
`Handle`	Provides access to the underlying Windows screen object for the control.
`HandleAllocated`	Reports whether a screen object handle exists for the control.
`Height`	Specifies the vertical size of the control in pixels.
`HelpContext`	The HelpContext property contains the numeric context ID that identifies the Help topic for the control.
`HelpKeyword`	The HelpKeyword property contains the keyword string that identifies the Help topic for the control.
`HelpType`	Specifies whether the control's context-sensitive Help topic is identified by a context ID or by keyword.
`Hint`	Hint contains the text string that appears when the user moves the mouse over the control.
`HostDockSite`	Specifies the control in which the control is docked.
`ImeMode`	Determines the behavior of the input method editor (IME).
`ImeName`	Specifies the input method editor (IME) to use for converting keyboard input to Asian language characters.
`IsDrawingLocked`	IsDrawingLocked property returns True when redrawing for this control is locked.
`ItemHeight`	<Delphi property ItemHeight of type TComboBox at 211414C9AC0>
`ItemIndex`	<Delphi property ItemIndex of type TComboBox at 211414C9B90>
`Items`	<Delphi property Items of type TComboBox at 211414CBE80>
`LRDockWidth`	Specifies the width of the control when it is docked horizontally.
`Left`	Specifies the horizontal coordinate of the left edge of a component relative to its parent.
`Margins`	Specifies the margins of the control.
`MaxLength`	<Delphi property MaxLength of type TComboBox at 211414C9C60>
`MouseInClient`	Indicates whether the mouse pointer is currently in the client area of the control.
`Name`	Specifies the name of the component as referenced in code.
`Observers`	Indicates the TObservers object added to the TComponent.
`OnChange`	<Delphi property OnChange of type TComboBox at 211414CABD0>
`OnClick`	<Delphi property OnClick of type TComboBox at 211414CACA0>
`OnCloseUp`	<Delphi property OnCloseUp of type TComboBox at 211414CAD70>
`OnContextPopup`	<Delphi property OnContextPopup of type TComboBox at 211414CAE40>
`OnDblClick`	<Delphi property OnDblClick of type TComboBox at 211414CAF10>
`OnDragDrop`	<Delphi property OnDragDrop of type TComboBox at 211414CAFE0>
`OnDragOver`	<Delphi property OnDragOver of type TComboBox at 211414CB0B0>
`OnDrawItem`	<Delphi property OnDrawItem of type TComboBox at 211414CB180>
`OnDropDown`	<Delphi property OnDropDown of type TComboBox at 211414CB250>
`OnEndDock`	<Delphi property OnEndDock of type TComboBox at 211414CB320>
`OnEndDrag`	<Delphi property OnEndDrag of type TComboBox at 211414CB3F0>
`OnEnter`	<Delphi property OnEnter of type TComboBox at 211414CB4C0>
`OnExit`	<Delphi property OnExit of type TComboBox at 211414CB590>
`OnGesture`	<Delphi property OnGesture of type TComboBox at 211414CB660>
`OnKeyDown`	<Delphi property OnKeyDown of type TComboBox at 211414CB730>
`OnKeyPress`	<Delphi property OnKeyPress of type TComboBox at 211414CB800>
`OnKeyUp`	<Delphi property OnKeyUp of type TComboBox at 211414CB8D0>
`OnMeasureItem`	<Delphi property OnMeasureItem of type TComboBox at 211414CB9A0>
`OnMouseEnter`	<Delphi property OnMouseEnter of type TComboBox at 211414CBA70>
`OnMouseLeave`	<Delphi property OnMouseLeave of type TComboBox at 211414CBB40>
`OnSelect`	<Delphi property OnSelect of type TComboBox at 211414CBC10>
`OnStartDock`	<Delphi property OnStartDock of type TComboBox at 211414CBCE0>
`OnStartDrag`	<Delphi property OnStartDrag of type TComboBox at 211414CBDB0>
`Owner`	Indicates the component that is responsible for streaming and freeing this component.
`Padding`	Specifies the padding of a control.
`Parent`	Specifies the parent of the control.
`ParentBiDiMode`	Specifies whether the control uses its parent's BiDiMode.
`ParentColor`	Specifies where a control looks for its color information.
`ParentCtl3D`	Determines where a component looks to determine whether it should have a three-dimensional look.
`ParentCustomHint`	Specifies where a control looks for its custom hint.
`ParentDoubleBuffered`	ParentDoubleBuffered defers the DoubleBuffered property of this component to the value of the parent's DoubleBuffered property.
`ParentFont`	Specifies where a control looks for its font information.
`ParentShowHint`	Specifies where a control looks to find out if its Help Hint should be shown.
`ParentWindow`	Reference to parent's underlying control.
`PixelsPerInch`	Embarcadero Technologies does not currently have any additional information.
`PopupMenu`	Specifies the pop-up menu associated with the control.
`RedrawDisabled`	RedrawDisabled property returns True when redrawing for this control is locked.
`ScaleFactor`	Embarcadero Technologies does not currently have any additional information.
`ShowHint`	ShowHint specifies whether to show the Help Hint when the mouse pointer moves over the control.
`Showing`	Indicates whether the control is showing on the screen.
`Sorted`	<Delphi property Sorted of type TComboBox at 211414CA480>
`Style`	<Delphi property Style of type TComboBox at 211414C8C20>
`StyleElements`	Specifies the style elements that are used by the control.
`StyleName`	Embarcadero Technologies does not currently have any additional information.
`TBDockHeight`	Specifies the height of the control when it is docked vertically.
`TabOrder`	Indicates the position of the control in its parent's tab order.
`TabStop`	Determines whether the user can tab to a control.
`Tag`	Stores a NativeInt integral value as a part of a component.
`Text`	Contains a text string associated with the control.
`TextHint`	<Delphi property TextHint of type TComboBox at 211414CA7C0>
`Top`	Specifies the Y coordinate of the upper-left corner of a control, relative to its parent or containing control in pixels.
`Touch`	Specifies the touch manager component associated with the control.
`UndockHeight`	Specifies the height of the control when it is floating.
`UndockWidth`	Specifies the width of the control when it is floating.
`UseDockManager`	Specifies whether the docking manager is used in drag-and-dock operations.
`VCLComObject`	Represents information used internally by components that support COM.
`Visible`	Specifies whether the component appears onscreen.
`VisibleDockClientCount`	Specifies the number of visible controls that are docked on the windowed control.
`Width`	Specifies the horizontal size of the control or form in pixels.
`WindowProc`	<Delphi property WindowProc of type TControl at 211418EC1C0>

Align#

Determines how the control aligns within its container (parent control). Use Align to align a control to the top, bottom, left, or right of a form or panel and have it remain there even if the size of the form, panel, or component that contains the control changes. When the parent is resized, an aligned control also resizes so that it continues to span the top, bottom, left, or right edge of the parent. For example, to use a panel component with various controls on it as a tool palette, change the panel’s Align value to alLeft. The value of alLeft for the Align property of the panel guarantees that the tool palette remains on the left side of the form and always equals the client height of the form. The default value of Align is alNone, which means a control remains where it is positioned on a form or panel.

Tip: If Align is set to alClient, the control fills the entire client area so that it is impossible to select the parent form by clicking it. In this case, select the parent by selecting the control on the form and pressing ESC, or by using the Object Inspector. Any number of child components within a single parent can have the same Align value, in which case they stack up along the edge of the parent. The child controls stack up in z-order. To adjust the order in which the controls stack up, drag the controls into their desired positions.

Note: To cause a control to maintain a specified relationship with an edge of its parent, but not necessarily lie along one edge of the parent, use the Anchors property instead.

Anchors#

Specifies how the control is anchored to its parent. Use Anchors to ensure that a control maintains its current position relative to an edge of its parent, even if the parent is resized. When its parent is resized, the control holds its position relative to the edges to which it is anchored. If a control is anchored to opposite edges of its parent, the control stretches when its parent is resized. For example, if a control has its Anchors property set to [akLeft, akRight], the control stretches when the width of its parent changes. Anchors is enforced only when the parent is resized. Thus, for example, if a control is anchored to opposite edges of a form at design time and the form is created in a maximized state, the control is not stretched because the form is not resized after the control is created.

Note: If a control should maintain contact with three edges of its parent (hugging one side of the parent and stretching the length of that side), use the Align property instead. Unlike Anchors, Align allows controls to adjust to changes in the size of other aligned sibling controls as well as changes to the parent’s size.

AutoCloseUp#: <Delphi property AutoCloseUp of type TComboBox at 211414C8810>

AutoComplete#: <Delphi property AutoComplete of type TComboBox at 211414C84D0>

AutoCompleteDelay#: <Delphi property AutoCompleteDelay of type TComboBox at 211414C85A0>

AutoDropDown#: <Delphi property AutoDropDown of type TComboBox at 211414C8670>

AutoDropDownWidth#: <Delphi property AutoDropDownWidth of type TComboBox at 211414C8740>

BevelEdges#: Specifies which edges of the control are beveled. Use BevelEdges to get or set which edges of the control are beveled. The BevelInner, BevelOuter, and BevelKind properties determine the appearance of the specified edges.

BevelInner#: Specifies the cut of the inner bevel. Use BevelInner to specify whether the inner bevel has a raised, lowered, or flat look. The inner bevel appears immediately inside the outer bevel. If there is no outer bevel (BevelOuter is bvNone), the inner bevel appears immediately inside the border.

BevelKind#: Specifies the control’s bevel style. Use BevelKind to modify the appearance of a bevel. BevelKind influences how sharply the bevel stands out. BevelKind, in combination with BevelWidth and the cut of the bevel specified by BevelInner or BevelOuter, can create a variety of effects. Experiment with various combinations to get the look you want.

BevelOuter#: Specifies the cut of the outer bevel. Use BevelOuter to specify whether the outer bevel has a raised, lowered, or flat look. The outer bevel appears immediately inside the border and outside the inner bevel.

BiDiMode#: Specifies the bidirectional mode for the control. Use BiDiMode to enable the control to adjust its appearance and behavior automatically when the application runs in a locale that reads from right to left instead of left to right. The bidirectional mode controls the reading order for the text, the placement of the vertical scroll bar, and whether the alignment is changed. Alignment does not change for controls that are known to contain number, date, time, or currency values. For example, with data-aware controls, the alignment does not change for the following field types: ftSmallint, ftInteger, ftWord, ftFloat, ftCurrency, ftBCD, ftDate, ftTime, ftDateTime, ftAutoInc.

CanFocus()#: Indicates whether a control can receive focus.

CanUndoSelText#: <Delphi property CanUndoSelText of type TComboBox at 211414CA2E0>

CharCase#: <Delphi property CharCase of type TComboBox at 211414C8E90>

Color#: Specifies the background color of the control. Use Color to read or change the background color of the control. If a control’s Vcl.Controls.TControl.ParentColor property is True, then changing the Color property of the control’s parent automatically changes the Color property of the control. When the value of the Color property is changed, the control’s ParentColor property is automatically set to False. The Color of a TLabel is always the color of the background unless you set TLabel.Transparent to False.

Constraints#

Specifies the size constraints for the control. Use Constraints to specify the minimum and maximum width and height of the control. When Constraints contains maximum or minimum values, the control cannot be resized to violate those constraints.

Note: Constraints apply to the height of the form. However, the height of the form depends on how large Windows makes the title bar. For example, Windows XP uses much larger title bars than other windowing systems. To work around this, note the ClientHeight when you design your form and set the constraints in the FormCreate event. In the following example, ClientHeight is represented by x: Constraints.MinHeight?:= x + Height - ClientHeight. Warning: Do not set up constraints that conflict with the value of the Align or Anchors property. When these properties conflict, the response of the control to resize attempts is not well-defined.

ControlCount#: Returns the count of contained controls

Controls#: Returns an iterator over contained controls

Ctl3D#

Determines whether a control has a three-dimensional (3-D) or two-dimensional look. Ctl3D is provided for backward compatibility. It is not used by 32-bit versions of Windows or NT4.0 and later, with the exception of Windows XP Home, where it is used on occasion. On earlier platforms, Ctl3D controlled whether the control had a flat or beveled appearance.

Note RAD Studio no longer supports Windows Vista or earlier.

DoubleBuffered#

Determines whether the control’s image is rendered directly to the window or painted to an in-memory bitmap first. When DoubleBuffered is false, the windowed control paints itself directly to the window. When DoubleBuffered is true, the windowed control paints itself to an in-memory bitmap that is then used to paint the window. Double buffering reduces the amount of flicker when the control repaints, but is more memory intensive. When a windowed control is a dock site and has an associated dock manager, it must be double-buffered.

Note: Some controls, such as TRichEdit, can’t paint themselves into a bitmap. For such controls, DoubleBuffered must be set to false.

DragCursor#

Specifies the image used to represent the mouse pointer when the control is being dragged. Use the DragCursor property to change the cursor image presented when the control is being dragged.

Note: To make a custom cursor available for the DragCursor property, see the Cursor property.

DragKind#: Specifies whether the control is being dragged normally or for docking. Use DragKind to get or set whether the control participates in drag-and-drop operations or drag-and-dock operations.

DragMode#: Specifies how the control initiates drag-and-drop or drag-and-dock operations. Use DragMode to control when the user can drag the control. Disable the drag-and-drop or drag-and-dock capability at run time by setting the DragMode property value to dmManual. Enable automatic dragging by setting DragMode to dmAutomatic. For more information about dmManual and dmAutomatic, see TDragMode.

DropDownCount#: <Delphi property DropDownCount of type TComboBox at 211414C9510>

DropDownWidth#: <Delphi property DropDownWidth of type TComboBox at 211414C95E0>

Enabled#

Controls whether the control responds to mouse, keyboard, and timer events. Use Enabled to change the availability of the control to the user. To disable a control, set Enabled to False. Some disabled controls appear dimmed (for example: buttons, check boxes, labels), while others (container controls) simply lose their functionality without changing their appearance. If Enabled is set to False, the control ignores mouse, keyboard, and timer events. To re-enable a control, set Enabled to True.

Note: This property applies to all TControl descendants.

ExtendedUI#: <Delphi property ExtendedUI of type TComboBox at 211414C9780>

Focused#: Determines whether the control has input focus.

Font#

Specifies the attributes of text written on or in the control. To change to a new font, specify a new TFont object. To modify a font, change the value of the Charset, Color, Height, Name , Pitch, Size, or Style of the TFont object.

Note: Changing the font color of the Caption is not supported for some controls (such as TButton). In most cases, there is an alternate control you can use whose Font property will change the color of the caption or text (such as TBitBtn or TSpeedButton).

Handle#: Provides access to the underlying Windows screen object for the control.

HandleAllocated#: Reports whether a screen object handle exists for the control.

ImeMode#

Determines the behavior of the input method editor (IME). Set ImeMode to configure the way an IME processes user keystrokes. An IME is a front-end input processor for Asian language characters. The IME hooks all keyboard input, converts it to Asian characters in a conversion window, and sends the converted characters or strings on to the application. ImeMode allows a control to influence the type of conversion performed by the IME so that it is appropriate for the input expected by the control. For example, a control that only accepts numeric input might specify an ImeMode of imClose, as no conversion is necessary for numeric input.

Note: The value of ImeMode only takes effect when the control receives focus. To change the value of ImeMode when the control already has input focus, call the SetIme method.

ImeName#

Specifies the input method editor (IME) to use for converting keyboard input to Asian language characters. Set ImeName to specify which IME to use for converting keystrokes. An IME is a front-end input processor for Asian language characters. The IME hooks all keyboard input, converts it to Asian characters in a conversion window, and sends the converted characters or strings on to the application. ImeName must specify one of the IMEs that has been installed through the Windows control panel. The property inspector provides a drop-down list of all currently installed IMEs on the system. At runtime, applications can obtain a list of currently installed IMEs from the global Screen variable. If ImeName specifies an unavailable IME, the IME that was active when the application started is used instead. No exception is generated.

Note: The value of ImeName only takes effect when the control receives focus. To change the value of ImeName after the control has input focus, call the SetIme method.

ItemHeight#: <Delphi property ItemHeight of type TComboBox at 211414C9AC0>

ItemIndex#: <Delphi property ItemIndex of type TComboBox at 211414C9B90>

Items#: <Delphi property Items of type TComboBox at 211414CBE80>

MaxLength#: <Delphi property MaxLength of type TComboBox at 211414C9C60>

OnChange#: <Delphi property OnChange of type TComboBox at 211414CABD0>

OnClick#: <Delphi property OnClick of type TComboBox at 211414CACA0>

OnCloseUp#: <Delphi property OnCloseUp of type TComboBox at 211414CAD70>

OnContextPopup#: <Delphi property OnContextPopup of type TComboBox at 211414CAE40>

OnDblClick#: <Delphi property OnDblClick of type TComboBox at 211414CAF10>

OnDragDrop#: <Delphi property OnDragDrop of type TComboBox at 211414CAFE0>

OnDragOver#: <Delphi property OnDragOver of type TComboBox at 211414CB0B0>

OnDrawItem#: <Delphi property OnDrawItem of type TComboBox at 211414CB180>

OnDropDown#: <Delphi property OnDropDown of type TComboBox at 211414CB250>

OnEndDock#: <Delphi property OnEndDock of type TComboBox at 211414CB320>

OnEndDrag#: <Delphi property OnEndDrag of type TComboBox at 211414CB3F0>

OnEnter#: <Delphi property OnEnter of type TComboBox at 211414CB4C0>

OnExit#: <Delphi property OnExit of type TComboBox at 211414CB590>

OnGesture#: <Delphi property OnGesture of type TComboBox at 211414CB660>

OnKeyDown#: <Delphi property OnKeyDown of type TComboBox at 211414CB730>

OnKeyPress#: <Delphi property OnKeyPress of type TComboBox at 211414CB800>

OnKeyUp#: <Delphi property OnKeyUp of type TComboBox at 211414CB8D0>

OnMeasureItem#: <Delphi property OnMeasureItem of type TComboBox at 211414CB9A0>

OnMouseEnter#: <Delphi property OnMouseEnter of type TComboBox at 211414CBA70>

OnMouseLeave#: <Delphi property OnMouseLeave of type TComboBox at 211414CBB40>

OnSelect#: <Delphi property OnSelect of type TComboBox at 211414CBC10>

OnStartDock#: <Delphi property OnStartDock of type TComboBox at 211414CBCE0>

OnStartDrag#: <Delphi property OnStartDrag of type TComboBox at 211414CBDB0>

ParentBiDiMode#: Specifies whether the control uses its parent’s BiDiMode. Use ParentBiDiMode to get or set whether the control uses its parent’s BiDiMode. When ParentBiDiMode is true, the control’s BiDiMode property is always equal to that of its parent. If ParentBiDiMode is false, the control uses its own BiDiMode property. Set ParentBiDiMode to true for all controls in a form to ensure that the entire user interface adjusts to Middle Eastern locales in a uniform manner. When the value of the control’s BiDiMode property changes, ParentBiDiMode becomes false automatically.

ParentColor#: Specifies where a control looks for its color information. To have a control use the same color as its parent control, set ParentColor to True. If ParentColor is False, the control uses its own Color property. Set ParentColor to True for all controls to ensure that all the controls on a form have a uniform appearance. For example, if ParentColor is True for all controls in a form, changing the background color of the form to gray causes all the controls on the form to also have a gray background. When the value of a control’s Color property changes, ParentColor becomes False automatically.

ParentCtl3D#: Determines where a component looks to determine whether it should have a three-dimensional look. ParentCtl3D is provided for backwards compatibility. It has no effect on 32-bit versions of Windows or NT 4.0 and later. ParentCtl3D determines whether the control uses its parent’s Ctl3D property.

ParentDoubleBuffered#: ParentDoubleBuffered defers the DoubleBuffered property of this component to the value of the parent’s DoubleBuffered property. ParentDoubleBuffered is a boolean indicating that the DoubleBuffered property of this component is overridden by the value of the parent’s DoubleBuffered property.

ParentFont#: Specifies where a control looks for its font information. To have a control use the same font as its parent control, set ParentFont to true. If ParentFont is false, the control uses its own Font property. Many controls default ParentFont to true so that all the controls in a form or other container present a uniform appearance. When the value of a control’s Font property changes, ParentFont becomes false automatically. When ParentFont is true for a form, the form uses the default font. Currently, the default font is Tahoma 8 pt.

ParentShowHint#

Specifies where a control looks to find out if its Help Hint should be shown. Use ParentShowHint to ensure that all the controls on a form either uniformly show their Help Hints or uniformly do not show them. If ParentShowHint is True, the control uses the ShowHint property value of its parent. If ParentShowHint is False, the control uses the value of its own ShowHint property. To provide Help Hints only for selected controls on a form, set the ShowHint property for those controls that should have Help Hints to True, and ParentShowHint becomes False automatically.

Note: Enable or disable all Help Hints for the entire application using the ShowHint property of the application object.

ParentWindow#: Reference to parent’s underlying control.

PopupMenu#: Specifies the pop-up menu associated with the control. Assign a value to PopupMenu to make a pop-up menu appear when the user selects the control and clicks the right mouse button. If the TPopupMenu’s AutoPopup property is True, the pop-up menu appears automatically. If the menu’s AutoPopup property is False, display the menu with a call to its Popup method from the control’s OnContextPopup event handler.

SetFocus()#: Gives the input focus to the control.

ShowHint#

ShowHint specifies whether to show the Help Hint when the mouse pointer moves over the control. ShowHint determines whether the Help Hint appears for the control. The Help Hint is the value of the TControl.Hint property. The Help Hint appears in a box just beneath the control when the mouse pointer moves over the control. To enable Help Hints for a particular control, two conditions must be satisfied:

The application’s ShowHint property must be True. Either the control’s own ShowHint property must be True, or the control’s ParentShowHint property must be True and its parent’s ShowHint property must be True. For example, imagine a check box within a group box. If the ShowHint property of the group box is True and the ParentShowHint property of the check box is True, but the ShowHint property of the check box is False, the check box still displays its Help Hint. Changing the ShowHint value automatically sets the ParentShowHint property to False.

Showing#: Indicates whether the control is showing on the screen.

Sorted#: <Delphi property Sorted of type TComboBox at 211414CA480>

Style#: <Delphi property Style of type TComboBox at 211414C8C20>

StyleElements#: Specifies the style elements that are used by the control. Use StyleElements to customize the style of the control. If a custom style is enabled, you can enable or disable style elements in the control. StyleElements is a set of values that specify which elements of the current style are to be applied to this control. By default, all the elements of the style are enabled.

StyleName#: Embarcadero Technologies does not currently have any additional information.

TabOrder#

Indicates the position of the control in its parent’s tab order. TabOrder is the order in which child windows are visited when the user presses the Tab key. The control with the TabOrder value of 0 is the control that has the focus when the form first appears. Initially, the tab order is always the order in which the controls were added to the form. The first control added to the form has a TabOrder value of 0, the second is 1, the third is 2, and so on. Change this by changing the TabOrder property. Each control has a unique tab-order value within its parent. If you change the TabOrder property value of one control to be the same as the value of a second control, the TabOrder value for all the other controls changes. For example, suppose a control is sixth in the tab order. If you change the control’s TabOrder property value to 3 (making the control fourth in the tab order), the control that was originally fourth in the tab order now becomes fifth, and the control that was fifth becomes sixth. Assigning TabOrder a value greater than the number of controls contained in the parent control moves the control to the end of the tab order. The control does not take on the assigned value of TabOrder, but instead is given the number that assures the control is the last in the tab order.

Note: TabOrder is meaningful only if the TabStop property is True and if the control has a parent. (The TabOrder property of a form is not used unless the form is the child of another form.) A control with a TabOrder of -1 has no parent, and therefore cannot be reached by pressing the Tab key. To remove a parented control from the Tab order, set its TabStop property to False.

TabStop#

Determines whether the user can tab to a control. Use the TabStop to allow or disallow access to the control using the Tab key. If TabStop is True, the control is in the tab order. If TabStop is False, the control is not in the tab order and the user cannot press the TAB key to move to the control.

Note: TabStop is not meaningful for a form unless the form assigns another form to be its parent.

Text#

Contains a text string associated with the control. Use the Text property to read the Text of the control or to specify a new string for the Text value. By default, Text is the control name. For edit controls and memos, the Text appears within the control. For combo boxes, the Text is the content of the edit control portion of the combo box.

Note: Controls that display text use either the Caption property or the Text property to specify the text value. Which property is used depends on the type of control. In general, Caption is used for text that appears as a window title or label, while Text is used for text that appears as the content of a control.

TextHint#: <Delphi property TextHint of type TComboBox at 211414CA7C0>

Touch#

Specifies the touch manager component associated with the control. Use the Touch property to access gesturing options associated with a control. Touch specifies a class of type TTouchManager. Touch is used to:

Associate a TGestureManager. (TGestureManager manages all the gestures that can be used by the control.) Select the standard, interactive, or custom gestures to associate with the control. (You can also connect each gesture to an action; see Assigning Actions to Gestures.) Specify a set of options for interactive or tablet gestures.

Visible#: Specifies whether the component appears onscreen. Use the Visible property to control the visibility of the control at run time. If Visible is True, the control appears. If Visible is False, the control is not visible. Calling the Show method sets the control’s Visible property to True. Calling the Hide method sets it to False. For TCustomForm descendants, the Show and ShowModal methods set Visible to True and bring the form to the front of all open windows. For TTabSheet descendants, Visible does not control the visibility of the control at run time. For more information, see the description of the TabVisible property.