Highlight text using conditional text

Hi,

     I need to highlight text using conditional text in InDesign.  I can highlight text using the below code.

var myDoc = app.activeDocument;

colorToHighlig = myDoc.conditions.add ({name:"Yellow",indicatorMethod:ConditionIndicatorMethod.USE_HIGHLIGHT, indicatorColor:UIColors.YELLOW});

app.findGrepPreferences = app.changeGrepPreferences = null;

app.changeGrepPreferences.appliedConditions = [colorToHighlig] ;

app.findGrepPreferences.findWhat = "chapter";

myDoc.changeGrep();

But I need to set Indicator to "Show and Print" coz while generation pdf with indicator mode "show", highlights are missing in PDF.  I can retain those highlights with the indicator mode "Show and Print". Dono how to set it..

If anyone know, pls help me.

Thanks in advance,

Sudha K