Need some help getting started modding an extension

[alloowishus]

I have included an great extension for the Rolemaster Classic ruleset that keeps track of xp. However, it is a manual entry, I would like XP to track automatically. I have found the xml file record_char_xp.xml and the first line has this
<windowclass name="record_char_xp">

Any clues on how I would reference this window directly? Thanks.

[damned]

you dont
if using window references you provide a relative path from where you are running your code
it is usually easier and less prone to breaking if you reference its database location instead rather than relative paths