// create the highlighting style, remember, it is alive whole editor session
var styleHighlight = new Style("my_highlighting", "Highlighting", "My Highlighting Style");
//styleHighlight.ForeColor = "#FF0000";
styleHighlight.BackColor = "#FFFF00";

function Highlight1()
{
	// get current cursor position
	var posAbs = ActiveDocument.TextToAbsolute(ActiveView.Position);
	
	// create range including two characters before and two after
	var posStart = ActiveDocument.AbsoluteToText(posAbs - 2);
	var posEnd = ActiveDocument.AbsoluteToText(posAbs + 2);
	var rangeHighlight = new Range(posStart.Line, posStart.Pos, posEnd.Line, posEnd.Pos);
	
	// highlight range with our style
	ActiveDocument.AddStyleRange(rangeHighlight, styleHighlight);	
}

function Highlight2()
{
	// get current cursor position
	var posStart = ActiveDocument.MovePosition(ActiveView.Position, -2);
	var posEnd   = ActiveDocument.MovePosition(ActiveView.Position, 2);
	
	// create range including two characters before and two after
	var rangeHighlight = new Range(posStart, posEnd);
	
	// highlight range with our style
	ActiveDocument.AddStyleRange(rangeHighlight, styleHighlight);	
}

Highlight2();

// remove our highlighting
sleep(3000);
ActiveDocument.RemoveStyleRanges(null, styleHighlight);