[amibroker] Dates highlighting in AMIBROKER

[loshude8888]

Hello Members,

I've a query regarding dates.  I've a list of events datewise more than 1000.  
My question is, how can those dates highlighted in Chart?

For example, I've an event on 01/01/2009 then one method is as follows :
   DateTime() == StrToDateTime("01/01/2008") 

But I've more than 1000 events, Is there any other way to solove my problem. 
Coz if I use abovementioed solution then my code will be too long.

Thanks in Advance,

Regards,
Lokesh