In the make target options on the right, under the Libraries tag in "Link libraries outside the project (LDADD)", you can add $(LIB_KIO)
--I just do that, But the error also:
config.pl: fast created 1 file(s).
config.status: executing depfiles commands
/bin/sh ../libtool --silent --mode=link --tag=CXX g++ -Wnon-virtual-dtor -Wno-long-long -Wundef -Wall -W -Wpointer-arith -Wwrite-strings -ansi -D_XOPEN_SOURCE=500 -D_BSD_SOURCE -Wcast-align -Wconversion -Wchar-subscripts -g3 -fno-inline -O0 -g3 -Wformat-security -Wmissing-format-attribute -fno-exceptions -fno-check-new -fno-common -o listbox -R /usr/lib -R /usr/lib/qt-3.3/lib -R /usr/X11R6/lib -L/usr/X11R6/lib -L/usr/lib/qt-3.3/lib -L/usr/lib main.o listbox.o -lkdeui
listbox.o(.text+0x1136): In function `listbox::startApp()':
/home/huting/Documents/Program/listbox/src/listbox.cpp:125: undefined reference to `KRun::KRun(KURL const&, unsigned int, bool, bool)'
collect2: ld returned 1 exit status
gmake[2]: