THintWindow implements the small pop-up window that appears over a control at runtime when the control has its ShowHint property set to true.
THintWindow = class(TCustomControl);
class THintWindow : public TCustomControl;
Use THintWindow to display a Help Hint pop-up window directly from an application. Override THintWindow to customize the window that appears automatically for controls with their ShowHint property set to true. After overriding THintWindow to create a new derived type, assign the new type to the global HintWindowClass variable at application startup, so that the new hint window type is used for Help Hints.
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