OnPaint event
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OnPaint event
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| acHeader, acHeaderPanel, acSplitterPanel and acPicturePanel components.
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| property OnPaint: TNotifyEvent;
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| The OnPaint event occurs when Windows requires the panel to paint, such as when the form or panel receives focus or becomes visible when it wasn't previously.
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| Your application can use this event to draw on the canvas of the header control. For example, to draw custom background.
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| Background structure.
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