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There is really no way to set the standard hint window to be always visible. The trick is to set the HintHidePause to a large value. minutes should almost always be enough. The hint window is shown only when the user moves the mouse over a component and the keyboard is inactive. Not many users keep the cursor over a control longer than 10 minutes...:) The default value is 2500 miliseconds (2.5 seconds).

    Application.HintHidePause := 600000;