`TLazSynSurfaceWithText`
pt		SetTextArea
pt		GetTextArea
		Assign

`TLazSynSurface`
pt		BoundsChanged
pt		DoPaint
pt		DoDisplayViewChanged
		Create
		Destroy
		Assign
		AddBoundsChangeHandler
		RemoveBoundsChangeHandler
		Paint
		InvalidateLines
		SetBounds