In Windows operating systems, the Control Panel is a vital part of the operating systems functionality, allowing you to change the way the operating system looks and behaves. In some environments, such as a domain with Group Policy restrictions, you may need to call some Control Panel items using the command line.
All Control Panel items run using .cpl files stored in the System32 folder. Here is a reference for the file names & which Control Panel extension it runs.

access.cpl Accessibility Options
appwiz.cpl Add/Remove Programs
bthprops.cpl Bluetooth Properties
desk.cpl Display Properties
firewall.cpl Windows Firewall
hdwwiz.cpl Add Hardware Wizard
inetcpl.cpl Internet Properties
intl.cpl Regional and Language Options
irprops.cpl Bluetooth Authentication Agent
javacpl.cpl Java Control Panel
joy.cpl Game Controllers
main.cpl Mouse Properties
mmsys.cpl Sound and Audio Devices
ncpa.cpl Network Connections Manager
netsetup.cpl Wireless Network Setup
nusrmgr.cpl User Accounts
nwc.cpl Gateway Services for Netware
odbccp32.cpl ODBC Data Source Administrator
powercfg.cpl Power Options
sysdm.cpl System Properties
telephon.cpl Telephony Options
timedate.cpl Date and Time Properties
wscui.cpl Windows Security Centre
wuaucpl.cpl Automatic Updates

Along with the Control Panel extensions, there are some more advanced tools that some administrators may find useful. These make use of the Microsoft Management Console, and all have a .msc extension.

admgmt.msc* Active Directory Management
azman.msc* Authorization Manager
certmgr.msc Certificates
certsrv.msc* Certification Authority
certtmpl.msc* Certification Templates
ciadv.msc Indexing Service
comexp.msc Component Services
compmgmt.msc Computer Management
devmgmt.msc Device Manager
dfrg.msc Disk Defragmenter
dfsgui.msc* Distributed File System
dhcpmgmt.msc* DHCP
diskmgmt.msc Disk Management
dnsmgmt.msc* DNS
domain.msc* Active Directory Domains and Trusts
dsa.msc* Active Directory Users and Computers
dssite.msc* Active Directory Sites and Services
eventvwr.msc Event Viewer
fsmgmt.msc Shared Folders
gpedit.msc Group Policy
ipaddrmgmt.msc* IP Address Management
lsusrmgr.msc Local Users and Groups
ntmsmgr.msc Removable Storage
ntmsoprq.msc Removable Storage Operator Requests
perfmon.msc Performance Monitor
pkmgmt.msc* Public Key Management
rsadmin.msc* Remote Storage
rsop.msc Resultant Set of Policy
schmmgmt.msc* Active Directory Schema
secpol.msc Local Security Settings
services.msc Services
tapimgmt.msc* Telephony
tsmmc.msc* Remote Desktops
uddi.msc* UDDI Services Console
winsmgmt.msc* WINS
wmimgmt.msc Windows Management Infrastructure (WMI)

* Requires Windows Server 2003 Administration Tools Pack