何度もすいません・・・これで使えるはずです。

NAME = "abc"
sdim tmp,64,36

BUF = "abc35q\nabc434\nabc"

notesel BUF
repeat noteinfo(0)
noteget a,cnt
if (instr(a,0,NAME) ! -1) {tmp(cn) = a : cn++}
loop
repeat cn
if (strlen(tmp(cnt)) = strlen(NAME)) {dialog ""+tmp(cnt)}
loop
noteunsel