Windows tool: rundll.exe advanced application

First, please make a small experiment (please save the results of the program you are running in advance ):

Click Start-process-ms-dos ", go to the DOS window, then click "rundll32.exe user.exe, restartwindows", and then press the Enter key. Then you will see that the machine has been restarted!

Of course, the function of rundll is not just to restart your machine. The difference between the two lies in that the former is a 32-bit link database, while the latter is a 16-bit link database. Their command format is:

Rundll. EXE ,,

Note the following three points:

1. The DLL file name cannot contain spaces. For example, if the file is in the C: Program Files directory, change the path to C: progra ~ 1;

2. The DLL file name and the DLL entry point must contain no fewer commas. Otherwise, the program will fail and no information will be provided!

3. This is the most important point: rundll cannot be used to call a DLL containing return value parameters, such as GetUserName () and gettextface () in WIN32API.

In Visual Basic, a command shell for executing external programs is provided, in the format:

Shell "command column"

If rundll32.exe is ready to use shell commands, it will make your VB program have effects that are hard to achieve or even unable to be implemented using other methods: restart is still used as an example. The traditional method requires you to create a module in the VB project, then write the winapi declaration before calling in the program. Now, you only need one sentence:

Shell restart rundll32.exe user.exe, restartwindows "is done!

In contrast, rundll32.exe has unique advantages in calling various windows control panels and System Options.

Command column: rundll32.exe shell32.dll, control_rundll

Function: Display Control Panel

Command column: rundll32.exe shell32.dll, control_rundll access. CPL, 1

Function: displays the "control panel-Auxiliary options-keyboard" option window.

Command column: rundll32.exe shell32.dll, control_rundll access. CPL, 2

Function: displays the "control panel-Auxiliary options-sound" option window.

Command column: rundll32.exe shell32.dll, control_rundll access. CPL, 3

Function: displays the "control panel-Auxiliary options-display" option window.

Command column: rundll32.exe shell32.dll, control_rundll access. CPL, 4

Function: displays the control panel-secondary option-mouse option window.

Command column: rundll32.exe shell32.dll, control_rundll access. CPL, 5

Function: displays the "control panel-Auxiliary options-traditional" option window.

Command column: rundll32.exe shell32.dll, control_rundll sysdm. Cpl @ 1

Function: run the "control panel-add new hardware" Wizard.

Command column: rundll32.exe shell32.dll, shhelpshortcuts_rundll addprinter

Function: run the control panel-add new printer wizard.

Command column: rundll32.exe shell32.dll, control_rundll appwiz. CPL, 1

Function: the "control panel-Add/delete programs-install/uninstall" panel is displayed.

Command column: rundll32.exe shell32.dll, control_rundll appwiz. CPL, 2

Function: the "control panel-Add/delete programs-install Windows" panel is displayed.

Command column: rundll32.exe shell32.dll, control_rundll appwiz. CPL, 3

Function: the "control panel-Add/delete programs-boot disk" panel is displayed.

Command column: rundll32.exe syncui. dll, briefcase_create

Function: Create a new "My Briefcase" on the desktop ".

Command column: rundll32.exe diskcopy. dll, diskcopyrundll

Function: displays the copy disk Window.

Command column: rundll32.exe apwiz. CPL, newlinkhere % 1

Function: the "Create shortcut" dialog box is displayed. The location of the created shortcut is determined by the % 1 parameter.

Command column: rundll32.exe shell32.dll, control_rundll TimeDate. CPL, 0

Function: displays the "Date and Time" option window.

Command column: rundll32.exe shell32.dll, control_rundll TimeDate. CPL, 1

Function: displays the "Time Zone" option window.

Command column: rundll32.exe rnaui. dll, rnadial [name of a dial-up connection]

Function: displays the dialing window for a dial-up connection. If a dial-up connection has been established, the current connection status window is displayed.

Command column: rundll32.exe rnaui. dll, rnawizard

Function: displays the window of the new dial-up connection wizard.

Command column: rundll32.exe shell32.dll, control_rundll desk. CPL, 0

Function: displays the "Display Properties-background" option window.

Command column: rundll32.exe shell32.dll, control_rundll desk. CPL, 1

Function: displays the "Display Properties-Screen Saver" option window.

Command column: rundll32.exe shell32.dll, control_rundll desk. CPL, 2

Function: displays the display properties-appearance option window.

Command column: rundll32.exe shell32.dll, control_rundll desk. CPL, 3

Function: displays the "show properties-properties" option window.

Command column: rundll32.exe shell32.dll, shhelpshortcuts_rundll fontsfolder

Function: display the "font" folder of windows.

Command column: rundll32.exe shell32.dll, control_rundll main. Cpl @ 3

Function: displays the "font" folder of windows.

Command column: rundll32.exe shell32.dll, shformatdrive

Function: displays the formatting dialog box.

Command column: rundll32.exe shell32.dll, control_rundll joy. CPL, 0

Function: displays the "control panel-Game Controller-General" option window.

Command column: rundll32.exe shell32.dll, control_rundll joy. CPL, 1

Function: displays the "control panel-game controller-advanced" option window.

Command column: rundll32.exe mshtml. dll, printhtml (HTML document)

Function: Print HTML documents.

Command column: rundll32.exe shell32.dll, control_rundll ml1_32.cpl

Function: displays the Microsoft Exchange General options window.

Command column: rundll32.exe shell32.dll, control_rundll main. Cpl @ 0

Function: displays the "control panel-mouse" option.

Command column: rundll32.exe shell32.dll, control_rundll main. Cpl @ 1

Function: displays the "control panel-keyboard properties-speed" option window.

Command column: rundll32.exe shell32.dll, control_rundll main. Cpl @ 1, 1

Function: displays the "control panel-keyboard properties-language" option window.

Command column: rundll32.exe shell32.dll, control_rundll main. Cpl @ 2

Function: displays the windows "Printer" folder.

Command column: rundll32.exe shell32.dll, control_rundll main. Cpl @ 3

Function: displays the windows "font" folder.

Command column: rundll32.exe shell32.dll, control_rundll main. Cpl @ 4

Function: displays the "control panel-Input Method properties-Input Method" option window.

Command column: rundll32.exe shell32.dll, control_rundll MODEM. CPL, add

Function: run the Add new modem wizard.

Command column: rundll32.exe shell32.dll, control_rundll mmsys. CPL, 0

Function: displays the "control panel-multimedia properties-Audio" property page.

Command column: rundll32.exe shell32.dll, control_rundll mmsys. CPL, 1

Function: displays the "control panel-multimedia properties-video" property page.

Command column: rundll32.exe shell32.dll, control_rundll mmsys. CPL, 2

Function: displays the "control panel-multimedia properties-Midi" property page.

Command column: rundll32.exe shell32.dll, control_rundll mmsys. CPL, 3

Function: displays the "control panel-multimedia properties-CD music" property page.
Command column: rundll32.exe shell32.dll, control_rundll mmsys. CPL, 4

Function: displays the "control panel-multimedia properties-devices" property page.

Command column: rundll32.exe shell32.dll, control_rundll mmsys. Cpl @ 1

Function: displays the control panel-sound option window.

Command column: rundll32.exe shell32.dll, control_rundll netcpl. CPL

Function: displays the control panel-Network option window.

Command column: rundll32.exe shell32.dll, control_rundll odbccp32.cpl

Function: displays the odbc32 data management option window.

Command column: rundll32.exe shell32.dll, openas_rundll

Function: displays the "open mode" dialog box for the specified file (driveath ilename.

Command column: rundll32.exe shell32.dll, control_rundll password. CPL

Function: the "control panel-Password" option window is displayed.

Command column: rundll32.exe shell32.dll, control_rundll powercfg. CPL

Function: displays the "control panel-Power Management Properties" option window.

Command column: rundll32.exe shell32.dll, shhelpshortcuts_rundll

Printersfolder

Function: displays the windows "Printer" folder. (Same as rundll32.exe shell32.dll, control_rundllmain.cpl @ 2)

Command column: rundll32.exe shell32.dll, control_rundll intl. CPL, 0

Function: the "control panel-region settings properties-region Settings" option window is displayed.

Command column: rundll32.exe shell32.dll, control_rundll intl. CPL, 1

Function: displays the "control panel-region settings properties-numbers" option window.

Command column: rundll32.exe shell32.dll, control_rundll intl. CPL, 2

Function: the "control panel-region settings properties-currency" option window is displayed.

Command column: rundll32.exe shell32.dll, control_rundll intl. CPL, 3

Function: displays the "control panel-region settings property-time" option window.

Command column: rundll32.exe shell32.dll, control_rundll intl. CPL, 4

Function: displays the "control panel-region settings properties-Date" option window.

Command column: rundll32.exe desk. CPL, installscreensaver [Screen saver file name]

Function: sets the specified screen saver file to Windows and displays the screen saver Properties window.

Command column: rundll32.exe shell32.dll, control_rundll sysdm. CPL, 0

Function: displays the "control panel-system properties-traditional" attribute window.

Command column: rundll32.exe shell32.dll, control_rundll sysdm. CPL, 1

Function: displays the "control panel-system properties-Device Manager" Properties window.

Command column: rundll32.exe shell32.dll, control_rundll sysdm. CPL, 2

Function: displays the "control panel-system properties-hardware configuration file" attribute window.

Command column: rundll32.exe shell32.dll, control_rundll sysdm. CPL, 3

Function: displays the "control panel-system properties-performance" attribute window.

Command column: rundll32.exe user.exe, restartwindows

Function: forcibly shut down all programs and restart the machine.

Command column: rundll32.exe user.exe, exitwindows

Function: forcibly shut down all programs and shut down them.

Command column: rundll32.exe shell32.dll, control_rundll telephon. CPL

Function: displays the "dial property" option window.

Command column: rundll32.exe shell32.dll, control_rundll themes. CPL

Function: displays the desktop theme option panel.

Of course, not just Visual Basic, like Delphi. other programming languages, such as Visual C ++, can also call external commands to use these functions of rundll. The specific method is not described here. The flexible use of rundll will make your program design easier and get twice the result with half the effort!

<Shutdown shortcut>

(1) Right-click the blank position on the desktop and choose <New> select <shortcut>

(2) In the <command line> type rundll.exe user.exe, exitwindows

(3). in <select a shortcut name> type <Close Window> or the name you want-> press <finish>

<Restart shortcut>

(1). Repeated (1)

(2) In the <command line> type rundll.exe user.exe, restartwindowsexec

(3) in <select a shortcut name> type <restart> or the name you want-> press <finish> Run-> cmd or command