When I press the UP arrow in a channel window for example, mIRC fills the edit box with lines I entered previously. I think it keeps a buffer of 10 lines.

A- Is there any way to enlarge this buffer?
B- Is there an identifier that returns the Nth line in this buffer?

NOTE: ... I mean, without using log files.

I counted buffer of 30 lines, and that should be enough...

No identifier, but it's scriptable...

I could script it for custom windows storing lines in a hash table or something and using on keydown to trigger the script when the up arrow is pressed (don't know tho if original mIRC up arrow function can be halted) but on keydown doesn't work in channel windows. Any suggestions?