var h1 = new GC.Spread.Sheets.CellTypes.HyperLink();
h1.text("GrapeCity");
h1.linkToolTip("link to GrapeCity Web page");
h1.linkColor("rgb(0, 100, 200)");
h1.visitedLinkColor("rgb(0, 200, 100)");
h1.moveActiveCellOnClick(true);
activeSheet.setCellType(1, 1, h1);
activeSheet.getCell(1, 1, GC.Spread.Sheets.SheetArea.viewport).value("http://spread.grapecity.com/").hAlign(GC.Spread.Sheets.HorizontalAlign.center);