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Use RunDll32 utilityTag(s): WinAPI/Registry

RunDll32 executable can be used to start various Windows utilities like the Control Panel. Note that they are not guaranteed to work across all Windows versions.

Here a list of what is available

rundll32 shell32,Control_RunDLL                     Run The Control Panel
rundll32 shell32,Control_RunDLL X                   Start applet X of Control Panel
                                                    ("X" = any CPL filename)
rundll32.exe shell32.dll,Control_RunDLL intl.cpl,,4 Regional setting, Date tab

rundll32 shell32,OpenAs_RunDLL \dir\filename.txt    Open The 'Open With...' Window
rundll32 shell32,ShellAboutA Info-Box               Open 'About Window Window'
rundll32 shell32,Control_RunDLL desk.cpl            Open Display Properties
rundll32 user,cascadechildwindows                   Cascade All Windows
rundll32 user,tilechildwindows                      Minimize All Child-Windows
rundll32 user,repaintscreen                         Refresh Desktop
rundll32 keyboard,disable                           Lock The Keyboard
rundll32 mouse,disable                              Disable Mouse
rundll32 user,swapmousebutton                       Swap Mouse Buttons
rundll32 user,setcursorpos                          Set Cursor Position To (0,0)
rundll32 user,wnetconnectdialog                     Show 'Map Network Drive' Window
rundll32 user,wnetdisconnectdialog                  Show 'Disconnect Network Disk' Window
rundll32 user,disableoemlayer                       Display The BSOD (blue screen of death)Window
rundll32 diskcopy,DiskCopyRunDll                    Show Copy Disk Window
rundll32 rnaui.dll,RnaWizard                        Run 'Internet Connection Wizard'
rundll32 shell32,SHFormatDrive                      Run 'Format Disk (A)' Window
rundll32 shell32,SHExitWindowsEx -1                 Cold Restart Of Windows Explorer
rundll32 shell32,SHExitWindowsEx 1                  Shut Down Computer
rundll32 shell32,SHExitWindowsEx 0                  Logoff Current User
rundll32 shell32,SHExitWindowsEx 2                  Windows9x Quick Reboot
rundll32 krnl386.exe,exitkernel                     Force Windows 9x To Exit (no confirmation)
rundll32 rnaui.dll,RnaDial "MyConnect"              Run 'Net Connection' Dialog
rundll32 msprint2.dll,RUNDLL_PrintTestPage          Choose & Print Test Page Of Current Printer
rundll32 user,setcaretblinktime                     Set New Cursor Rate Speed
rundll32 user, setdoubleclicktime                   Set New DblClick Speed (Rate)
rundll32 sysdm.cpl,InstallDevice_Rundll             Hardware installation wizard
rundll32 user,MessageBeep                           Default beep sound
rundll32 user32.dll,MessageBeep                     Default beep sound (XP)
rundll32 shell32.dll,Control_RunDLL appwiz.cpl      Add/remove programs
rundll32 shell32.dll,Control_RunDLL timedate.cpl,,0 Date/time settings
rundll32 shell32.dll,Control_RunDLL odbccp32.cpl    ODBC settings

rundll32.exe url.dll,FileProtocolHandler http:\\
rundll32.exe url.dll,FileProtocolHandler c:\mypdf.pdf
                                                    Open the associated application
rundll32 amovie.ocx,RunDll /play /close c:\mymovie.mpg                                    
                                                    Play multimedia (movie or sound)

Rundll32.exe powrprof.dll,SetSuspendState Sleep     Put the computer in Sleep mode 

Privacy (IE)  
rundll32.exe InetCpl.cpl,ClearMyTracksByProcess 8   Internet temporary files
rundll32.exe InetCpl.cpl,ClearMyTracksByProcess 2   Cookies 
rundll32.exe InetCpl.cpl,ClearMyTracksByProcess 1   History
rundll32.exe InetCpl.cpl,ClearMyTracksByProcess 16  Forms Data
rundll32.exe InetCpl.cpl,ClearMyTracksByProcess 32  Passwords
rundll32.exe InetCpl.cpl,ClearMyTracksByProcess 255 Delete everything 
The Windows Fax viewer is used to view a variety of graphic format like .bmp, .dib, .emf, .gif, .jpeg, .png, .tif or .wmf extensions
rundll32.exe shimgvw.dll,ImageView_Fullscreen 
  "C:\Documents and Settings\username\My Documents\logo.bmp"
In Powerbuilder to launch the rundll32 utility, use the Powerscript Run function.
string command

command='rundll32.exe InetCpl.cpl,ClearMyTracksByProcess 8'