Question

how to lock destop

Asked by: hoaivan

i'm developing an online testing system that need to lock user's desktop during testing. Anybody give me ideas how to do this. Many tks.

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Asked On
2006-01-24 at 18:13:16ID21709092
Tags

destop

,

lock

Topic

Miscellaneous Programming

Participating Experts
5
Points
250
Comments
8

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Answers

 

by: sriramiyerPosted on 2006-01-24 at 19:34:26ID: 15783277

Hi hoaivan,

Free readymade sample code available.

Try this URL:

http://www.freevbcode.com/source/DesktopLock.zip

Hope it helps to you.

Regards,
SriRamIyer.

 

by: _iskywalker_Posted on 2006-01-24 at 20:05:21ID: 15783380

try xlock :)

 

by: jchittoda1Posted on 2006-01-24 at 23:03:02ID: 15783957

Hi,
Try this changing Registry Values

http://www.winguides.com/registry/display.php/642/
http://www.winguides.com/registry/display.php/443/
-------------------------------------------------------------------------
Create a new DWORD value based on the options below, and set the new value to equal "1" to enable the restriction or "0" to disable the restriction.

NoChangingWallpaper - Disable the ability to change wallpapers.
NoComponents - Disable components.
NoAddingComponents - Disable the ability to add components.
NoDeletingComponents - Disable the ability to delete components.
NoEditingComponents - Disable the ability to edit components.
NoCloseDragDropBands - Prevents adding, dragging, dropping and closing the Taskbar's toolbars.
NoMovingBands - retrict adjustments to desktop toolbars
NoHTMLWallPaper - only allow bitmaps (BMP) as wallpaper
These restrictions can be used either on a user by user basis by adding it to HKEY_CURRENT_USER or on a computer wide basis by adding it to HKEY_LOCAL_MACHINE.


User Key: [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\
ActiveDesktop]

System Key: [HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\
ActiveDesktop]

Data Type: REG_DWORD (DWORD Value)
Value Data: (0 = disable restriction, 1 = enable restriction)

 

by: TribmosPosted on 2006-01-25 at 10:33:04ID: 15788882

If by 'lock the desktop' you mean make it so that the user cannot leave the testing screen.

I dont beleive you can enforce this in a webpage.

In a program maybe by using the maxamized and topmost, however multiple display setups could fool this (ie where multiple monitors to increase dekstop space).

Another option for a program is in the 'lost focus' for the application have it give itself focus back (be carefull to ignore on shutdown of the application)

 

by: namo21Posted on 2006-02-11 at 22:54:27ID: 15933732

use WinKey+L
in winxp

20120131-EE-VQP-002

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