How to change comment

AX2009

// USR Changed on 2013-07-10 at 12:57:46 by 7519 - Begin
// USR Changed on 2013-07-10 at 12:57:46 by 7519 - End
public void comments_insertHeader(Editor e)
{
    UserInfo    userInfo;
    name        name;
    str         source;
    ;
    e.unmark();
    e.gotoLine(1);
    e.gotoCol(1);

    /* Original
    source = '// Changed on ' + date2str(today(),123,2,1,3,1,4, DateFlags::FormatAll ) + ' at ' + time2str(timenow(), 1, 1) + ' by ' + curuserid() + '
';
    */
    /*
    source += "// " + strUpr(enum2str(currentAOLayer())) + " Changed on " + date2str(today(),123,2,1,3,1,4,
    DateFlags::FormatAll ) + " at " + time2str(timenow(), 1, 1) + " by " + curuserid() + '
';
    */
    
    select firstOnly userInfo where userInfo.id == curUserId();
    
    name = subStr(userInfo.networkAlias, strLen(userInfo.networkAlias) - 3,strlen(userInfo.networkAlias));
    name = Global::isInteger(name) ? name : UserInfo.id;
  
    source += "// " + strUpr(enum2str(currentAOLayer())) + " Changed on " +
                date2str(today(),321,2,3,2,3,4, DateFlags::FormatAll ) + " at " +
                time2str(timenow(), 1, 1) + " by " + name + " - Begin" + '
' +
                "	" + "// " + strUpr(enum2str(currentAOLayer())) + " Changed on " +
                date2str(today(),321,2,3,2,3,4, DateFlags::FormatAll ) + " at " +
                time2str(timenow(), 1, 1) + " by " + name + " - End" + '
';
                
    e.insertLines(source);
}

AX2012

http://fandyax.blogspot.hk/2012/11/how-to-using-code-changed-comment-in.html