Vcl.StdCtrls.TCustomComboBox Events

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InheritedProtected
OnAlignInsertBeforeprotectedOccurs when an object with custom alignment is aligned.
OnAlignPositionprotectedOccurs when an object with custom alignment is aligned.
OnCanResizeprotectedOccurs when an attempt is made to resize the control.
OnChangeprotectedOccurs when the user changes the text displayed in the edit region.
OnClickprotectedOccurs when the user clicks the control.
OnCloseUpprotectedOccurs when the drop-down list closes up due to some user action.
OnConstrainedResizeprotectedAdjusts the resize constraints.
OnContextPopupprotectedOccurs when the user right-clicks the control or otherwise invokes the pop-up menu (such as using the keyboard).
OnDblClickprotectedOccurs when the user double-clicks the left mouse button when the mouse pointer is over the control.
OnDockDropprotectedOccurs when another control is docked to the control.
OnDockOverprotectedOccurs when another control is dragged over the control.
OnDragDropprotectedOccurs when the user drops an object being dragged.
OnDragOverprotectedOccurs when the user drags an object over a control.
OnDrawItemprotectedOccurs when an item in an owner-draw combo box needs to be displayed.
OnDropDownprotectedOccurs when the user opens the drop-down list.
OnEndDockprotectedOccurs when the dragging of an object ends, either by docking the object or by canceling the dragging.
OnEndDragprotectedOccurs when the dragging of an object ends, either by dropping the object or by canceling the dragging.
OnEnterprotectedOccurs when a control receives the input focus.
OnEnumerateControlpublicEvent called to check whether a control should be enumerated by GetControls.
OnExitprotectedOccurs when the input focus shifts away from one control to another.
OnGesturepublicOccurs when you perform a gesture associated with this control.
OnGetDeltaStreamsprotectedAllows a component to generate and provide a list of delta streams representing changes to the component's state.
OnGetSiteInfoprotectedReturns the control's docking information.
OnKeyDownprotectedOccurs when a user presses any key while the control has focus.
OnKeyPressprotectedOccurs when a key is pressed.
OnKeyUpprotectedOccurs when the user releases a key that was pressed.
OnMeasureItemprotectedOccurs when an item in a csOwnerDrawVariable combo box needs to be redisplayed.
OnMouseActivateprotectedOccurs when the user presses a mouse button with the mouse pointer over a control and the parent form is not active.
OnMouseDownprotectedOccurs when the user presses a mouse button with the mouse pointer over a control.
OnMouseEnterprotectedOccurs when the user moves the mouse into a control.
OnMouseLeaveprotectedOccurs when the user moves the mouse outside of a control.
OnMouseMoveprotectedOccurs when the user moves the mouse pointer while the mouse pointer is over a control.
OnMouseUpprotectedOccurs when the user releases a mouse button that was pressed with the mouse pointer over a component.
OnMouseWheelprotectedOccurs when the mouse wheel is rotated.
OnMouseWheelDownprotectedOccurs when the mouse wheel is rotated downward.
OnMouseWheelUpprotectedOccurs when the mouse wheel is rotated upward.
OnResizeprotectedOccurs immediately after the control is resized.
OnSelectprotectedOccurs when the user selects a string in the drop-down list.
OnStartDockprotectedOccurs when the user begins to drag a control with a DragKind of dkDock.
OnStartDragprotectedOccurs when the user begins to drag the control or an object it contains by left-clicking the control and holding the mouse button down.
OnUnDockprotectedOccurs when the application tries to undock a control that is docked to the windowed control.
WindowProcpublicPoints to the window procedure that responds to messages sent to the control.