Version 20120510 Beta (freeware).
Works on Bricscad V10.5, V11.4 and V12.2 for Windows.
May work on other Bricscad V10-V12 for Windows versions.
By downloading the zip file you agree to the
End-user license agreement for free software (freeware).
Download link: BKG_Extrim.zip (< 20kB)
BKG_Extrim is a program to quickly trim all entities intersecting a cutting entity.
Unpack BKG_Extrim.des from the zip file in a folder in the search path
and follow the instructions you can find here.
To load the program automatically add one of these code segments to on_doc_load.lsp:
(load "BKG_Extrim")
(autoload "BKG_Extrim" '("Bxtr" "BKG_Extrim"))