RAD Studio VCL Reference
ContentsIndex
TCustomComboBoxEx Members Protected Methods
Protected Methods
 
Name 
Description 
 
Called when an application uses a component interface. 
 
Called when an application releases a component interface. 
 
Responds when the action for which this combo box is a client changes. 
 
Sets control's window style according to its bi-directional support. 
 
Provides the interface that adjusts the ClientRect property for idiosyncrasies of the window. 
 
Adjusts the size and position of the drop down list. 
 
Sets the size of the control as determined by the AutoSize property. 
 
Adjusts the control's size according to its contents and constraints. 
 
Aligns any controls for which the control is the parent within a specified area of the control. 
 
This is ArrangeControl, a member of class TWinControl. 
 
Copies the properties of an object to a destination object. 
 
Overrides the inherited AssignTo function to enable assignments to TAction objects. 
 
Copies the properties of the windowed control to another object. 
 
Begin Automatic Drag. 
 
This is CalcCursorPos, a member of class TControl. 
 
Indicates whether the control can resize itself automatically to accommodate its contents. 
 
Indicates how the control can be resized. 
 
OnCanResize event dispatcher. 
 
Indicates how the control can respond to a resize attempt. 
 
Generates an OnChange event. 
 
Sends a CM_CHANGED message to the control. 
 
Sets the private, internal storage for the Name property to the string passed in NewName. 
 
Rescaling event dispatcher. 
 
Resize and reposition children and self. 
 
Respond to user click. 
 
Generates an OnCloseUp event. 
 
Responds when the Color property changes. 
 
Responds when the ParentColor property changes. 
 
Responds to notifications of changes in the combo box. 
 
Responds to Windows messages sent to the combo box. 
 
Responds to Windows messages sent to the edit control or drop-down list. 
 
Notify control of resize with constraints. 
 
Generates an OnConstrainedResize event. 
 
This is ControlsAligned, a member of class TWinControl. 
 
Creates the dock manager for the control. 
 
Creates underlying screen object. 
 
Initializes the window-creation parameter record. 
 
Creates a windowed control derived from an existing Windows window class. 
 
Creates a Windows control to represent the control. 
 
Creates the underlying Windows control that implements the extended combo box. 
 
Returns placement order of custom-aligned child control. 
 
Returns aligned position of custom-aligned child control. 
 
OnDblClick event dispatcher. 
 
Handles the painting and erasing of a dock image. 
 
Designates methods for storing an object's unpublished data on a stream such as a form file. 
 
Provides an interface for a method that reads and writes otherwise unpublished data. 
 
Provides methods to read and write the IsControl property to a stream such as a form file. 
 
Provides methods to read and write the IsControl property to a stream such as a form file. 
 
This is DesignWndProc, a member of class TControl. 
 
Destroys the control's window without destroying the control. 
 
Destroys the window created in the CreateWindowHandle method. 
 
Destroys all of the windows controls that implement the combo box. 
 
Destroys the Windows control that represents the combo box. 
 
Performs actions when a control is docked to the windowed control. 
 
Responds when a docking client is dragged over the windowed control. 
 
This is DockReplaceDockClient, a member of class TWinControl. 
 
Handles dragging of the control over an invalid docking target. 
 
OnContextPopup event dispatcher. 
 
Docking event dispatcher. 
 
Generates an OnDockOver event. 
 
OnEndDock event dispatcher. 
 
OnEndDrag event dispatcher. 
 
Respond to receiving input focus. 
 
Respond to losing input focus 
 
Flips the control's children. 
 
Performs some preprocessing before generating an OnKeyDown event. 
 
Performs some preprocessing before generating an OnKeyPress event. 
 
Performs some preprocessing before generating an OnKeyUp event. 
 
Processes mouse wheel motion. 
 
OnMouseWheelDown event dispatcher. 
 
OnMouseWheelUp event dispatcher. 
 
Responds when a control is undocked from the windowed control. 
 
OnStartDock event dispatcher. 
 
OnStartDrag event dispatcher. 
 
Undocks a control that is currently docked to the windowed control. 
 
Provides the interface for a method that responds to the cancellation of a drag. 
 
OnDragOver event dispatcher. 
 
Draws the dock image for the control. 
 
Generates an OnDropDown event. 
 
Responds to Windows messages that are sent to the edit control portion of the combo box. 
 
Erases the dock image for the control. 
 
Returns the control's next child in the tab order after the specified control. 
 
Sorts the child controls by their tab order. 
 
This is GetAction, a member of class TControl. 
 
Returns the action link class that is associated with extended combo boxes. 
 
Returns the owner of a child component being read from a stream. 
 
Returns the parent, or if there is no parent, returns the owner of a child component being read from a stream. 
 
This is GetChildren, a member of class TComponent. 
 
Calls a specified method for each child of the control. 
 
Returns the screen coordinates of the top-left corner of the control's client area. 
 
Returns the value of the ClientOrigin property. 
 
Returns a rectangle defining the client area of the control. 
 
Returns the value of the ClientRect property. 
 
Returns the smallest rectangle in which all the control's children fit. 
 
Returns the number of items in the list. 
 
Returns the value of the ItemCount property. 
 
Returns a device context for the control. 
 
Provides access to a device context for the control. 
 
Returns the edge on which another control should be docked when it is dragged over the control. 
 
Returns the control's image list containing the image to be displayed while dragging. 
 
Returns the value of the DroppedDown property. 
 
Returns the value of the Enabled property. 
 
Returns the value of the Floating property. 
 
Returns the class used for the control when it is floating. 
 
Maps a single member and an optional set of argument names to a corresponding set of integer dispatch identifiers (dispIDs). 
 
Returns the number of items in the Items property list. 
 
Returns the height, in pixels, allocated for each item in the drop-down list. 
 
Returns the value of the ItemIndex property. 
 
Returns the value of the ItemIndex property. 
 
Returns the class used to implement the Items property. 
 
Returns the owner of a component. 
 
Returns the owner of an object. 
 
Returns the handle to a palette for use by the control. 
 
Returns the window handle for the window of the control's parent. 
 
Returns the pop-up menu associated with the control. 
 
Returns the value of the SelLength property. 
 
Returns the value of the SelStart property. 
 
Generates an OnGetSiteInfo event 
 
Returns the window handle of the first window not associated with a VCL control that contains the windowed control. 
 
Retrieves the type information for an object. 
 
Returns the number of type information interfaces that an object provides (either 0 or 1). 
 
This is InvalidateDockHostSite, a member of class TWinControl. 
 
Provides access to Automation properties and methods when the component wraps an Automation object. 
 
This is IsControlActivateMsg, a member of class TWinControl. 
 
Indicates whether a specified mouse message is directed to one of the windowed control's child controls. 
 
This is IsQualifyingSite, a member of class TWinControl. 
 
Respond to key press events. 
 
Respond to keyboard input. 
 
Respond to released key. 
 
Responds to Windows messages that are sent to the drop-down list portion of the combo box. 
 
Initializes the component after the form file has been read into memory. 
 
Initializes the control after it is loaded from a stream. 
 
Initializes the combo box after its form is loaded into memory. 
 
Receives Windows messages for the control. 
 
This is MouseActivate, a member of class TControl. 
 
OnMouseDown event dispatcher. 
 
Respond to mouse moving over control area.. 
 
OnMouseUp event dispatcher. 
 
Responds to notifications that objects are about to be inserted or removed. 
 
Sends a message to all the child controls. 
 
Paints each of the child controls in a windowed control using the specified device context. 
 
Responds to WM_PAINT messages. 
 
Renders the image of a windowed control. 
 
Responds to changes in the system's palette by realizing the control's palette. 
 
Responds to changes in the system's palette by realizing the control's palette and the palette for each child control. 
 
Responds when the component is created from the component palette. 
 
Positions the docking rectangle according to the current drag-and-dock state. 
 
Returns a reference to a specified interface if the object supports that interface. 
 
This is ReadState, a member of class TComponent. 
 
Prepares the control for having its properties assigned values read from a stream. 
 
Prepares the control for having its properties assigned values from a stream. 
 
Recreate underlying Windows screen object. 
 
Reloads a docked control. 
 
This is RemoveWindowProps, a member of class TWinControl. 
 
Instructs the parent of a control to reposition the control, enforcing its Align property. 
 
Restores the input method editor (IME) that was active when the application started. 
 
Directs the composition window of the input method editor (IME) to perform a specific action. 
 
Respond to control resize. 
 
This is ScaleConstraints, a member of class TControl. 
 
Rescale child controls only. 
 
Generates an OnSelect event. 
 
Locates first selectable child control. 
 
Moves the input focus from the current child control to the next one in the tab order. 
 
Cancels the modal state of the control. 
 
Sends a Windows message to the control's host dock site. 
 
This is SetAncestor, a member of class TComponent. 
 
This is SetAutoSize, a member of class TControl. 
 
Sets the control's bi-directional mode. 
 
This is SetChildOrder, a member of class TComponent. 
 
Changes the order in which the child component appears in the list of child components returned by the GetChildren method. 
 
Ensures that components inserted at design time have their design-mode flag set. 
 
Ensures that components inserted at design time have their design-mode flag set. 
 
Sets the drag mode for the control. 
 
Sets the value of the DropDownCount property. 
 
Sets the value of the DroppedDown property. 
 
Sets the value of the Enabled property. 
 
Activates an input method editor (IME) using the values specified by the ImeMode and ImeName properties. 
 
Sets the position and font of the composition window. 
 
Sets the csInline bit of the component's ComponentState property 
 
Sets the value of the ItemHeight property. 
 
Sets the value of the ItemIndex property. 
 
Sets the value of the ItemIndex property. 
 
Sets the value of the Items property. 
 
Sets the value of the MaxLength property. 
 
Sets the value of the Name property. 
 
Sets the name of the control. 
 
Sets the parent of the control. 
 
Sets the parent of the control. 
 
This is SetParentBackground, a member of class TWinControl. 
 
Specifies whether the control uses its parent's BiDiMode
 
This is SetParentComponent, a member of class TComponent. 
 
Sets the parent for the control. 
 
Sets the value of the SelLength property. 
 
Sets the value of the SelStart property. 
 
Repositions the control in its parent's control list, thereby changing position onscreen. 
 
Moves the control to the top or bottom of the parent control's (or screen's) list of TWinControl controls. 
 
Ensures that a specified child control is visible. 
 
This is UpdateBounds, a member of class TWinControl. 
 
Changes the Top, Left, Width, and Height properties of the control, but doesn't update its screen image and bypasses all resize events. 
 
This is UpdateControlOriginalParentSize, a member of class TWinControl. 
 
Clears the csUpdating state in the component's ComponentState property when the component finishes updating. 
 
This is UpdateExplicitBounds, a member of class TControl. 
 
This is UpdateRecreatingFlag, a member of class TWinControl. 
 
Provides the interface for a method that adds type library and version information to the Registry on components that implement COM interfaces. 
 
Updates form User Interface State as needed 
 
Sets the csUpdating state in the component's ComponentState property. 
 
Determines whether an object can be inserted into a container. 
 
Provides the interface for a method that validates an child component before it is inserted. 
 
Ensures that renaming an owned component does not create name conflict. 
 
Provides the interface for a method that responds to changes in the control's visibility. 
 
This is WMHelp, a member of class TCustomComboBoxEx. 
 
Responds when the user clicks the left mouse button on the combo box. 
 
Processes messages received by the combo box. 
 
This is WriteState, a member of class TComponent. 
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