How to make a TEXT Header Bold?

My name is Ben Hardin and I am totally new to the ARIS API.  I am creating an excel document and I need to make the headers bold.  I am proving a snippet of code.  But near the  g_attrListToPrint object.  I have it set up in the form of an array. When I print out the excel sheet I will need all the headers bold.  Can some give me some insight on how to do that.  Initially I tried to do this below by adding the FMT_BOLD.  But after executing the program I found out for that to be wrong.

Constants.AT_NAME. FMT_BOLD,    (This is wrong)                                                             

Constants.AT_DESC. FMT_BOLD,     (This is wrong) 

Constants.AT_REM. FMT_BOLD,       (This is wrong) 

Constants.AT_LAST_CHNG_2. FMT_BOLD,

var xlsBook;

var xlsFontHeader;

var xlsHeader;

var xlsFontStandard;

var xlsStandard;

var g_objTypeToFind = Constants.OT_APPL_SYS_TYPE;

var g_cxnTypeToFind = Constants.CT_BELONGS_TO_CLS;

var g_cxnDirectionToFind = Constants.EDGES_IN;

var g_attrListToPrint =  [  Constants.AT_NAME,                                                                  

                                        Constants.AT_DESC, 

                                        Constants.AT_REM, 

                                        Constants.AT_LAST_CHNG_2,