Dim directory_ As String = "C:\WINDOWS\system32\"

        For Each filename As String In IO.Directory.GetFiles(directory_, "*", IO.SearchOption.AllDirectories)

            Dim fName As String = IO.Path.GetExtension(filename)
            If fName = ".exe" Then

                Dim file As String
                file = System.IO.Path.GetFileName(filename)

                TextBox1.AppendText(file & vbCrLf)
            End If

        Next

ac3config.exe
accwiz.exe
AcSignOpt.exe
actmovie.exe
ahui.exe
alg.exe
append.exe
arp.exe
asr_fmt.exe
asr_ldm.exe
asr_pfu.exe
at.exe
atmadm.exe
attrib.exe
auditusr.exe
autochk.exe
autoconv.exe
autofmt.exe
autolfn.exe
blastcln.exe
bootcfg.exe
bootok.exe
bootvrfy.exe
cacls.exe
calc.exe
charmap.exe
chkdsk.exe
chkntfs.exe
cidaemon.exe
cipher.exe
cisvc.exe
ckcnv.exe
cleanmgr.exe
cliconfg.exe
clipbrd.exe
clipsrv.exe
cmd.exe
cmdl32.exe
cmmon32.exe
cmstp.exe
comp.exe
compact.exe
conime.exe
control.exe
convert.exe
cscript.exe
csrss.exe
ctfmon.exe
dcomcnfg.exe
ddeshare.exe
debug.exe
defrag.exe
dfrgfat.exe
dfrgntfs.exe
diantz.exe
diskpart.exe
diskperf.exe
dllhost.exe
dllhst3g.exe
dmadmin.exe
dmremote.exe
doskey.exe
dosx.exe
dplaysvr.exe
dpnsvr.exe
dpvsetup.exe
driverquery.exe
drwatson.exe
drwtsn32.exe
dsmux.exe
dumprep.exe
dvdplay.exe
dvdupgrd.exe
dwwin.exe
dxdiag.exe
edlin.exe
esentutl.exe
eudcedit.exe
eventcreate.exe
eventtriggers.exe
eventvwr.exe
exe2bin.exe
expand.exe
extrac32.exe
fastopen.exe
fc.exe
femgrate.exe
find.exe
findstr.exe
finger.exe
fixmapi.exe
FlashPlayerApp.exe
fltMc.exe
fontview.exe
forcedos.exe
freecell.exe
fsquirt.exe
fsutil.exe
ftp.exe
gdi.exe
gdsmux.exe
getmac.exe
GfxUI.exe
gpresult.exe
gpupdate.exe
grpconv.exe
hkcmd.exe
hostname.exe
ie4uinit.exe
ieudinit.exe
iexpress.exe
igfxext.exe
igfxpers.exe
igfxsrvc.exe
igfxtray.exe
imapi.exe
ipconfig.exe
ipsec6.exe
ipv6.exe
ipxroute.exe
krnl386.exe
label.exe
lights.exe
locator.exe
lodctr.exe
logagent.exe
logman.exe
logoff.exe
logonui.exe
lpq.exe
lpr.exe
lsass.exe
magnify.exe
makecab.exe
mem.exe
mkv2vfr.exe
mmc.exe
mmcperf.exe
mnmsrvc.exe
mobsync.exe
mountvol.exe
mplay32.exe
mpnotify.exe
mqbkup.exe
mqsvc.exe
mqtgsvc.exe
mrinfo.exe
mscdexnt.exe
msconfig.exe
msdtc.exe
msfeedssync.exe
msg.exe
mshearts.exe
mshta.exe
msiexec.exe
mspaint.exe
mspainttw.exe
msswchx.exe
mstinit.exe
mstsc.exe
napstat.exe
narrator.exe
nbtstat.exe
nddeapir.exe
NeroCheck.exe
net.exe
net1.exe
netdde.exe
netsetup.exe
netsh.exe
netstat.exe
nlsfunc.exe
notepad.exe
nslookup.exe
ntbackup.exe
ntkrnlpa.exe
ntoskrnl.exe
ntsd.exe
ntvdm.exe
nw16.exe
nwscript.exe
odbcad32.exe
odbcconf.exe
openfiles.exe
osk.exe
osuninst.exe
packager.exe
pathping.exe
pentnt.exe
perfmon.exe
ping.exe
ping6.exe
powercfg.exe
PresentationHost.exe
print.exe
progman.exe
proquota.exe
proxycfg.exe
qappsrv.exe
qprocess.exe
qwinsta.exe
rasautou.exe
rasdial.exe
rasphone.exe
rcimlby.exe
rcp.exe
rdpclip.exe
rdsaddin.exe
rdshost.exe
recover.exe
redir.exe
reg.exe
regedt32.exe
regini.exe
regsvr32.exe
regwiz.exe
relog.exe
replace.exe
reset.exe
rexec.exe
route.exe
routemon.exe
rsh.exe
rsm.exe
rsmsink.exe
rsmui.exe
rsnotify.exe
rsopprov.exe
rsvp.exe
runas.exe
rundll32.exe
runonce.exe
rwinsta.exe
savedump.exe
sc.exe
scardsvr.exe
schtasks.exe
sdbinst.exe
secedit.exe
services.exe
sessmgr.exe
sethc.exe
setup.exe
setupn.exe
setver.exe
sfc.exe
shadow.exe
share.exe
shmgrate.exe
shrpubw.exe
shutdown.exe
sigverif.exe
skeys.exe
smbinst.exe
smlogsvc.exe
smss.exe
sndrec32.exe
sndvol32.exe
sol.exe
sort.exe
spdif_test.exe
spider.exe
spiisupd.exe
spnpinst.exe
spoolsv.exe
sprestrt.exe
spupdsvc.exe
stimon.exe
subst.exe
svchost.exe
syncapp.exe
sysedit.exe
syskey.exe
sysocmgr.exe
systray.exe
taskkill.exe
tasklist.exe
taskman.exe
taskmgr.exe
tcmsetup.exe
tcpsvcs.exe
telnet.exe
tftp.exe
tlntadmn.exe
tlntsess.exe
tlntsvr.exe
tracerpt.exe
tracert.exe
tracert6.exe
tscon.exe
tsdiscon.exe
tskill.exe
tsshutdn.exe
typeperf.exe
tzchange.exe
unlodctr.exe
upnpcont.exe
ups.exe
user.exe
userinit.exe
usrmlnka.exe
usrprbda.exe
usrshuta.exe
utilman.exe
verclsid.exe
verifier.exe
vssadmin.exe
vssvc.exe
vwipxspx.exe
w32tm.exe
Wacom_Tablet.exe
wextract.exe
wiaacmgr.exe
winchat.exe
WinFXDocObj.exe
winhlp32.exe
winlogon.exe
winmine.exe
winspool.exe
winver.exe
wowdeb.exe
wowexec.exe
wpnpinst.exe
write.exe
wscntfy.exe
wscript.exe
wuauclt.exe
wuauclt1.exe
wupdmgr.exe
xcopy.exe
Wacom_TabletUser.exe
mofcomp.exe
scrcons.exe
unsecapp.exe
wbemtest.exe
winmgmt.exe
wmiadap.exe
wmiapsrv.exe
wmic.exe
wmiprvse.exe
migload.exe
migwiz.exe
migwiza.exe
nppagent.exe
FlashPlayerUpdateService.exe
FlashUtil32_26_0_0_131_ActiveX.exe
NPSWF32_FlashUtil.exe
uninstall_plugin.exe
GfxUI.exe
hkcmd.exe
igfxext.exe
igfxpers.exe
igfxsrvc.exe
igfxtray.exe
ie4uinit.exe
iexplore.exe
mshta.exe
comrepl.exe
comrereg.exe
AudioProfiler.exe
CleanUp.exe
CleanUp_x64.exe
CodecSettings.exe
DisableUpdateChecker.exe
dxwebsetup.exe
mpc-hc.exe
SetACL.exe
TrayMenu.exe
Uninst.exe
UpdateChecker.exe
sendrpt.exe
DriUpdate32.exe